Saturday, April 2, 2022
Classic and Vintage Bike Ride
Tuesday, March 1, 2022
A Social Ride During COVID
Monday, February 7, 2022
Emerald Hills Go-To Ride
Ride Name | Number of Rides |
---|---|
Neighborhood | 250 |
Alpine | 140 |
Alpine Cañada | 30 |
Peninsula Bikeway | 40 |
Tamarack Sprint | 6 |
Ride Name | Number of Rides |
---|---|
Trainer | 70 |
New Alpine | 30 |
New Alpine Cañada | 30 |
Emerald Hills | 30 |
Lake Loop | 15 |
Huddart | 10 |
Wednesday, January 19, 2022
My First eBike: an Orbea Gain
- I had just moved to Emerald Hills and because of those hills, was finding it hard to do easy rides.
- It would allow us to ride together, my electric assist making up for his younger age.
- It might be fun for me to try some modern, high end bicycle technology.
- Given my age, I did not have an unlimited number of years of riding ahead of me so if I was going to do this, I might as well do it now to make the most of those years.
What kind of bike is an Orbea Gain? It is an eBike built on the platform of a high end, thoroughly modern gravel bike. I am partial to bicycles manufactured by Bianchi, a fact Michael knows, but Bianchi’s eBike offering, their Aria, is built off the platform of a road bike and thus Michael felt that as a result it was not as appropriate a bike for me as the Orbea. Compared to the Aria, the Gain has a more relaxed geometry, wider tires, and lower gears (50x34 in front and 11x32 in back.)
What do I mean when I say the Orbea is high end and thoroughly modern? Pretty much everything on the Orbea that can be, is made of carbon fiber. It has Shimano Ultegra electronic derailleurs. It has Shimano hydraulic disk brakes. All the cables and wires run inside the frame to minimize wind drag and to optimize appearance. It does not go out of its way to advertise that it is an eBike; the battery is hidden inside of a rather normal looking downtube and the motor is in the rear hub. Anyone knowledgeable who looks at it will be able to see it for what it is, but it does have the general appearance of a normal bike. As for the electric side of things, it has no throttle, it only provides pedal assist. If I don’t push, it doesn’t help. It has three levels of assist plus a fourth no-assist setting. This was by far the most expensive bike I have ever purchased; inflation doesn't even begin to offset that.
How was it, buying a bike on the Internet? The vendor, Contender Bicycles, Inc., was terrific. They seemed to be surprised to get such a large order out of the blue and called to thank me for it and to assure me I could contact them any time for help, an offer on which I have taken them up. They suggested that I take advantage of a shipper they used that does nothing but transport bicycles, which I did. It meant I got the bike a few days later than I would have but guaranteed my new bike would be handled with the care it deserved. The truck arrived and when the driver opened the back, I could see that all the bikes were held in bike-specific racks. He carefully removed my bike, reattached the front wheel, and that was that.
My first reaction to this amazing new bike was overwhelming fear that I would do something to damage it. My new Orbea came with no paper manuals and the manuals I found online were insufficient in my view, at least to a modern carbon fiber novice like me. I called Contender and they confirmed that what I found was all that was available but again reassured me they would be there to help. One thing that the online manuals did tell me was the torque required for every nut and bolt on the bike, so I ordered a torque wrench set from Amazon. I had to call Contender to find out how to raise and lower the saddle. They warned me about the pitfalls I should watch out for when I did that; the invisible bolt that held the saddle, if loosened too much, could fall into the seat tube, creating an adventure that the kind folks at Contender assured me I did not want. It turns out that, because the frame is carbon, I cannot put this bike on the bike rack on my car, a rack that supports a bike by the frame’s top tube, nor can I put it on my repair stand; both the top tube and the seatpost where the stand would attach are carbon. Someone on the Internet suggested getting an aluminum seatpost to swap in just to work on the bike. Contender warned me not to do that, so no repair stand for me. Even absent a repair stand, I did get the seat height adjusted without incident and put some old, low-end SPD pedals on the bike so I could go for a test ride.
The first thing I noticed was that the front disk brake rubbed. I got on the Internet and figured out how to adjust it. This reduced but did not eliminate the rubbing; it still rubs for a few minutes after I apply the front brake or after I lean too hard into a turn, but that was the best I could do. (The back brake, by comparison, has never rubbed.) On the other hand, the brakes are AWESOME! I have never felt so in control on the steep, narrow, windy roads of my neighborhood. Could I now do an easy ride starting at my house? Sadly, no. The algorithm in the power assist requires I work before it will help. Also, even at the highest assist level, it took all of my strength and all of the eAssist to make it up the steepest hill in my neighborhood, a short (0.1 mile) hill that Strava assures me has an average grade of 23%. On the other hand, I did make it up that hill in the end so having this bike means I can ride anywhere I want in my neighborhood without checking that the grades are not too steep. Still, my fear that I was going to damage this bike and my ignorance about how to do basic roadside maintenance on it were causing me to ride it less often than I might have. One silly issue was ‘what if I got a puncture?’ I knew this bike was tubeless-ready, but was it tubeless or did it have tubes? The rims were carbon. Could I use my usual tire irons and techniques to change a punctured tube? In response, I decided to avoid straying too far so that I could walk the bike home if necessary. Finally, my one complaint with Contender is that they had mounted the front tire incorrectly such that it went ‘bump bump bump’ when I rode, tolerable on the rough roads in my neighborhood but annoying the two times I took it out on my smoother New Alpine ride.
At this point, Michael and I were getting a little discouraged. Was this bike a mistake, a bike I wouldn’t ride much? I really didn’t want that to happen so I developed a Go-To ride that stayed within walking distance of my home. By riding my new bike mostly for that ride I was able to use it on a fairly regular basis. I kept thinking that I ought to just take the bike to Gebhart at my LBS and pay him to help me with it, but I felt bad I had not purchased it from him so held back until the day the rear disk brakes started making a funny noise; I worried that if I ignored that I might damage the bike. By this point, my favorite bike, my Bianchi Volpe, was so badly in need of maintenance I could no longer ride it. Finally, for a variety of reasons Gebhart had been sitting on my Bianchi Specialissima for almost two years and I wanted to nudge him about that. All of these issues together pushed me over the edge and I gave him a call. “I’d love to see your Orbea!” he said. “Bring it in.” After much work, he got the front tire reseated, no more ‘bump bump bump.’ He straightened the disk for the front disk brake. When I got the bike home, that made no difference, the amount of rubbing was the same but at least I knew it was not something stupid I had done. He said the rear brake was fine, but put a bit of lubricant on the disk to take the noise away. The lubricant accomplished that but it also reduced its stopping power. However, by the end of the first ride the lubricant was gone, the brakes worked as well as before, and the funny noise was back, but again his reassurances meant I could ignore it. Finally, he assured me I had tubes and that my existing tube changing tools and techniques would work fine. Besides reseating the front tire, Gabhart had mostly just provided reassurance but that made all the difference. He sold me a water bottle cage that looked nice on this fancy new bike, I attached my pump to the second water bottle mounts, put the seat bag with my tools and spare tube under the seat, and I now have a bike as serviceable as any I own. Gebhart also ordered me some Ultegra SPD pedals that will be more suitable for this bike. (Since then, he has also overhauled my Volpe and he is making slow but sure progress on the Specialissima.)
In many respects (cost, technology, the electric power assist) my Orbea Gain is unique among my bikes, but in other ways, it fits right in. Since acquiring the Orbea, I have ridden it 37 times (28% of my rides) for a total of just over 400 miles. Two of those rides were over my New Alpine route which allowed me to compare it to most of my other bikes. Even from my new home, this is a route I can manage on a fair number of my bikes including my 1960 Bianchi Specialissima, my 2010 Surly Cross Check, my 2007 Bianchi Volpe, and my reborn 1967 Hetchins, so when I rode it on the Orbea, I did it with the power assist turned off. With the power assist on, low gears are less important but the Orbea does have a fairly low bottom gear of 29”, almost identical to my Surly at 28” but not as low as the Volpe at 22”. By comparison, the Specialissima and the Hetchins have low gears of 46” and 44” respectively, unimpressive low gears which are nonetheless adequate for the New Alpine route. Presumably the gravel bike from which the Gain is derived is quite light, but once you add a battery and motor, the Gain itself comes in at a hefty 29 pounds, only exceeded by the Surly at 30 pounds. The lightweights are the Specialissima and Hetchins at 24 and 25 pounds respectively leaving the Volpe in the middle at 27 pounds. (Given how overweight I am, the weight of the bike is probably pretty unimportant.) Is there something magic about the Orbea that, despite its weight, would make it especially fast? It would seem not, its speed on the two New Alpine rides was comparable to rides on the Volpe or Cross Check ridden a few days before or after.
I have already confessed that as wonderful as my new Orbea Gain is, it did not give me the easy ride for which I have been yearning*. In compensation, it opened up a new Go-To ride for me, one with some unique advantages (which I will discuss in a future post). It also allows me to keep up with my son Michael, either when it is just him on his non-electric road bike or when he is on his cargo eBike with his two kids. Finally, the Orbea has allowed me to try out the latest bicycle technology. The most important difference between my Orbea and the rest of my bikes is the electric assist feature which is absolutely game changing, but here I want to consider its other modern features. I have already commented on the hydraulic disk brakes, one of my favorite features of this bike. The electronic shifting is impressive indeed! It is stunning to shift the gears and hear the derailleurs adjust themselves to a perfect position. One thing I find slightly annoying about the index shifting on my Surly and my Volpe are that I cannot ‘tune’ the shifting like I can on my Specialissima and my Hetchins and so occasionally, in some gears, the derailleurs are positioned slightly suboptimally. The Orbea provides the best of both, the convenience of indexed shifting while providing an automated tuning to optimize derailleur position. As impressive as I find this, I have to say it is not game changing; neither the index shifting of my Volpe and Surly nor the manual shifting of my Hetchins and Specialissima bother me all that much. While it is true that the Orbea most definitely has the best shifting of all my bikes, it’s just that it does not make all that big a difference to me. There is something absurd about this bike in that it is constructed largely of lightweight carbon fiber, an advantage that is more than offset by its battery and motor. I can’t say that I find the ride experience of carbon all that different from the rest of my bikes, all of which have steel frames. The difference in ride quality between my Surly (which I like less) and my Volpe (which I like more) is vastly greater than any difference I feel with the Orbea. Finally, I want to talk about one component on this bike that surprised me the most: the saddle. I am a huge fan of old school Brooks leather saddles which I have on my Volpe, Hetchins, and Specialissima. By comparison, the more modern plastic saddle that came with my Surly is barely tolerable (though it is better than any other plastic saddle I had tried up until now.) Thus, I wondered what I was going to do about the plastic Fizik Aliante R5 saddle that came with the Orbea. The good news was that, because the Orbea is a gravel bike, the saddle was not as terrifyingly narrow as those found on most modern road bikes, but a Brooks it was not. Putting a Brooks on this bike didn’t seem like an option. Brooks saddles require long offset seatposts which are not compatible with the Orbea. I was thinking about some more modern leather saddles that do not require a special seatpost but figured I’d first give the Fizik a try. It felt hard compared to my Brooks saddles, but when I took the bike out on the longer New Alpine ride, I found that although this saddle felt a little less cushy at first, it didn’t become less comfortable with time the way the Surly saddle did; it was fine. Now that I am more comfortable taking the Orbea out on the road, I am eager to try this saddle on some even longer rides. In summary, although this clearly was not my most cost effective bicycle purchase, I am glad I have it and for me it was definitely worth the money.
* As I will detail in a future post, I ended up solving the ‘easy ride’ problem by setting up my trainer to be used for such rides.
Friday, December 3, 2021
Modelling Fitness, Fatigue, & Form
Using Banister’s model^ to predict how Fitness, Fatigue and Form will change over time. To generate the above graph, a training schedule was defined consisting of a ride generating a Load of 1 (in arbitrary units) to be ridden for 200 days and then training is stopped. At first, Fatigue dominates Fitness and Form (the ability to perform on a ride) falls. Then, Fitness dominates Fatigue and Form increases. When training stops, because Fatigue decreases faster than Fitness, Form increases. This is the reason that the taper period right before an event is so common in training plans.
In my last post I wondered if I had been training too hard. One way to avoid that would be for me to monitor my training load (hereafter Load) to see if it is increasing, decreasing, or staying the same. If treated with full rigor, measuring that Load would be an impossibly complex task, so we all find simplifications for estimating Load that are better than nothing, or over time, better than we were doing before. I have, in fact, gone the other way, partially out of necessity (the hills where I live make it harder to ride at a fixed intensity or to estimate the overall intensity of a ride) and partly out of an attempt to simplify my life (when my heart meter broke, I didn’t bother to replace it.) Now and again, however, I regret that and wonder if it would be worth the effort to better track my rides. At present, the only way I am estimating my Load is to record the minutes of duration of each ride. Even that is better than nothing, but when I wonder if the increasing hilliness of my new neighborhood is throwing off my estimates it makes me want to do more. The first step in doing more would be to acquire a power meter or a heart rate monitor. That device, along with some basic software would allow me to characterize a ride in terms of minutes in Zone 1, minutes in Zone 2, etc which is better than just total minutes. If I had been doing that over the last couple of years and had noticed that my total minutes of riding stayed the same after I moved but that the zone distribution moved to more time in higher zones, that would already tell me I had increased my Load. To make that quantitative rather than qualitative, I would need to estimate the relative Load produced by different zones, something I have blogged about a fair bit and thus feel like I know how to do. The purpose of this post is to discuss the next step after that, to model the competing impacts of my training load on Fitness and Fatigue and how they play out over Time.
The inspiration for this post came while I was preparing my post on Sweet Spot Training. I was listening to a podcast by Frank Overton, the person who coined the term Sweet Spot, and he talked about how motivating it was to use modelling software to track the accumulation of fitness resulting from his training. I am very motivated by tracking my training and I found the prospect of incorporating this new kind of tracking very tempting. In order to figure out how I might do that I began exploring the training models that are used to do so, and thus today’s post.
The reason training increases performance (Form) is because the Fatigue generated by training goes away faster than the Fitness generated by that same training. That is the basis of the training models I will be talking about. It is more complicated than that; there are different kinds of Fatigue and different stages in the recovery from Fatigue and the Fitness generated by training doesn’t appear immediately but only over time, thus the truism that you don’t get stronger during training but during the rest after training. The models I will be talking about simplify things by ignoring some of that complexity.
I am aware of two models for estimating Fatigue, Fitness, and Form, the model developed by Dr. Andy Coggan (available as part of the widely used Training Peaks commercial software package) and that developed by Dr. Eric Banister^. Both of these models do two things. First, they estimate the Load generated by a ride based on how much Time during that ride the athlete spends at different power output levels or heart rates (respectively) and then assigns to each of those an Intensity score. Higher power or heart rate corresponds to higher Intensity but not necessarily in a linear way; a doubling of power or heart rate can result in a much greater than doubling of Intensity. Because I have blogged about the calculation of Intensity a lot, I won’t discuss it in this post. Rather, I will assume that given a power output level or heart rate an Intensity can be calculated. As just one example of how to do that, I offer the following equation* for calculating the Intensity of some of my rides from the Heart Rate (HR) measured on those rides:
Intensity = .000428 x e(.0656 x HR).
Load corresponds pretty directly to how tired the athlete is after a ride. If an athlete knows the Intensity of a ride, converting that to Load is straightforward:
Load = Intensity x Time
For a ride at constant Intensity, it really is that simple. For a realistic ride during which Intensity varies, it is still pretty simple but there are a couple of different ways of making this calculation. The good news is that they all give pretty similar results, it is mostly about which is the most convenient. For example, back when I was tracking my rides with a Garmin heart rate monitor, a Garmin bike computer, and Garmin software, I could have taken the amount of time spent in each heart rate training zone provided by that software, use an average Intensity for each zone, and sum up the five Intensity x Time values to get a total Load for the ride. But how does Load relate to Form, Fitness, and Fatigue? Both Fitness and Fatigue result from the accumulation of Load over many days of training on the one hand and the reduction of both Fitness and Fatigue that occurs during the time after that training. In other words, Load pushes both Fitness and Fatigue up, Time pulls both Fitness and Fatigue down. Expressed as equations, the effects of Load and Time are:
Fx(Load on Day N, Time since Day N) )
Fatigue = ( Fy(Load on Day 1, Time since Day 1) + Fy(Load on Day 2, Time since Day 2) + … +
Fy(Load on Day N, Time since Day N) )
...where Fx() and Fy() are functions that reduce the impacts of Load on Fitness and Fatigue for older rides; that epic ride I did ten years ago isn’t doing me much good anymore. Fx() is slower than Fy() such that an athlete loses Fatigue faster than they lose Fitness. As a result, training eventually produces a net increase in performance.
Finally, the following equation is used to model expected performance (Form):
Form = Fitness - Fatigue
Note that Intensity, Load, Fatigue, Fitness, and Form have no natural units. However, due to the above equation, the units for Form, Fitness, and Fatigue all need to be the same. What is commonly done is to first assign some constant to relate Load to Fitness and Fatigue. In the Coggan model, one unit of Load is defined as producing one unit of both Fatigue and Fitness. In the Banister model, one unit of Load produces one unit of Fitness, but two units of Fatigue. In both models, one unit of Form, Fitness and Fatigue are defined to be equal.
The interesting part of both models is how Fitness and Fatigue decrease over time, the functions Fx(Load, Time) and Fy(Load, Time) in the above equations. I confess that I do not understand the Coggan model. Using equations available on the Web, I get nonsensical outputs. Thus, from here on out, I will focus on the Banister model. In this model, both Fitness and Fatigue decrease exponentially with Time as per this equation:
Fitness = M1 x Load x Time x e(-Time / T1)
Fatigue = M2 x Load x Time x e(-Time / T2)
...where:
M1 is the relative iMpact of a given Load on Fitness. By default, this is set to 1.
M2 is the relative iMpact of a given Load on Fatigue. By default, this is set to 2; the initial impact of a ride on Fatigue is assumed to be twice that on Fitness.
T1 is the Time in days it takes for the impact of a ride on Fitness to decrease to 37% of its initial impact. By default, this is set to 45 days.
T2 is the Time in days it takes for the impact of a ride on Fatigue to decrease to 37% of its initial impact. By default, this is set to 15 days.
Time is the time in days since the ride.
Let’s see what this model predicts for some hypothetical scenarios. The figure at the top of this post describes a very unrealistic scenario the point of which is to illustrate the main features of the model. In this scenario, a ride with a Load set to an (arbitrary) value of 1 is done every day for 200 days and then training is stopped. The Banister Model correctly reproduces the premise behind periodized training: training increases both Fitness and Fatigue, and at first, performance (Form) decreases due to Fatigue, but over time, the Fitness dominates and Form increases. If training stops, at first Form increases because Fatigue is lost faster than Fitness. This is the rationalization for tapering (reducing training) before an event. So far, the model seems good, but let’s apply it to some more realistic scenarios. I have selected the training plans offered by Coach John Hughes to prepare for a first 200 kilometer long ride and then to allow repeating that ride every month. I have modified these plans to scale them down for a 100 kilometer (Metric Century) ride.
I have added a fourth curve to the above graph, one showing the Load generated by the training plan. The three biggest peaks on the graph are the three long training rides, each increasingly longer, used to get ready for the Metric Century. The graph stops the day before that event. We can see that each of the long rides produces a peak of both Fitness and Fatigue but because the increase in Fatigue is greater, Form decreases in the days after that hard ride. However, it increases thereafter because Fatigue goes away faster than Fitness. Training tapers (decreases) just before the Metric Century and we see that Fitness levels off but that Fatigue falls and as a result the all-important Form continues to increase, reaching a maximum just before the event. This is exactly what is expected for a well designed training plan, and again, the model seems to capture it fairly accurately.
The final curve is for the scenario I so laboriously derived on this blog some time ago, a training plan to maintain the Form to be able to ride a Metric Century every month:
In this graph I added trendlines in order to emphasize that this is a maintenance schedule designed to keep Form relatively constant between the monthly Metric Centuries, those Metric Centuries being not only the goal of but also a critical part of the training plan. I plotted three monthly cycles, starting the day after a Metric Century and ending two days after the third Metric Century. Once again, the model seems to reconstruct the intent of the training program fairly accurately.
In summary, the Banister model (at least) seems pretty good. Of course, it does not do everything. For one thing, it allows you to input training schedules that no sane person would design and that nobody but Superman could follow. There is no limit on the amount of Load that can be completed, the amount Fatigue that can be tolerated, nor the amount of Fitness that will theoretically result from such a suicide schedule. Similarly, it does not model the notion of working up to a goal, like the 20% biweekly increases in mileage I use to work up to a Metric Century. According to this model, an athlete can just jump right into the longest training ride, repeating that until enough fitness has been built up. I see these as reasonable and expected limits as to what the model was designed to do. I think what Banister had in mind when he created the model is that it is up to the coach to plan a good training schedule and that the model is just one more tool to be used judiciously by the coach in service to that effort. Finally, I assume that part of a coach using this model would be adjusting the parameters to fit the individual athlete.
I would like to mention one additional limitation of this model, a limitation that impacts this whole way of thinking about training. This limitation is that the model defines Fitness as a single thing when it is obvious that it is not. The world of road racing provides a clear example of this. Road racers can be classified as climbers, sprinters, time trialists, etc., each needing to build a different collection of different kinds of Fitness. Coach Joe Friel in his classic book “The Cyclist’s Training Bible” describes three basic and three advanced kinds of fitness, each one needing its own training plan to be developed. These are Endurance, Force, and Speed and then Muscular Endurance, Anaerobic Endurance, and Power, respectively. And all of this is just within the narrow specialty of Road Racing. Does this negate everything above? I hope not! What I hope and believe is that the approach I am outlining here applies similarly to all these different kinds of Fitness, and that in fact they may be interchangeable. That is, a coach builds a training plan to address all the different kinds of Fitness a particular cyclist needs to meet their goals but common to them all is the tradeoff between Fitness (of any kind) and Fatigue described by me in this post and modelled by Banister.
I would like to end by explaining how I imagine this tool could be useful. Although it is far from clear I will ever do this myself, I will nonetheless use myself as an example to explain how I think this might work. Right now, I am only tracking ride time. This completely ignores the possibility that one 60 minute ride might be much harder (generating both more Fitness and more Fatigue) than another. If I were to purchase a heart rate monitor and/or a power meter, I could calculate the Intensity of those rides allowing me to account for such differences; I might find that one 60 minute ride generated twice the Load as another, for example. What would still be missing is the effect of Time. Have I rested long enough to recover from a hard ride? Have I rested too long so that I have lost the fitness that ride gave me? The value of Banister’s model would be to help me answer such questions. Will I ever do this? I have no idea, stay tuned.
^ “Modeling Elite Athletic Performance” by Banister, Eric W. in “Physiological Testing of the High-Performance Athlete, Second Edition” 1982, Published by Human Kinetics Publishers (UK) Ltd. Rawdon, England. ISBN 0-87322-300-4
* I derived this equation by using Google Sheets to plot the Intensity values for Hughes TRIMP, described in my most recent post on intensity and then to fit them to an exponential function. This is the equation Google Sheets fit to the plot.
Tuesday, November 9, 2021
My Recent Training
My recent training schedule showing reduced mileage. The last column labelled “ave min/wk” is my minutes per week averaged over the last year. My heart broke when that sank below 300. Note that the last time I rode my 33 mile "New Alpine-Cañada" ride was on 6/30/2021.
Four months ago, I posted "One change I am making, at least for the moment, is to ride a bit less in general and to relax what had been my fierce determination to ride at least 300 minutes a week and at least 4 rides a week." That decision was based on my tentative conclusion that my declining performance was due to an accumulation of fatigue, that my previous training schedule produced more load than my body could tolerate. How did that go? In short, the jury is still out, but I did learn enough that I thought it was worth an update.
Let me start by acknowledging an elephant in the room. I am a very bad patient of my medical care team, missing many office visits and diagnostic screenings. Thus, my poor performance could well be due to an illness that has not been diagnosed due to this negligence. However, I have nothing useful to say about that at this juncture, if I ever drag my negligent ass to the doctor, I will tell you what I find out. Short of that, if not an illness, what is it that is holding back my performance?
“What is holding back my performance” might be a combination of things, so the following list should not be seen as exclusive, a mixture of them might be the culprit. That said, here is my list:
- Because of the hills where I live, I might be training harder than I think I am and thus training too hard.
- Instead, the opposite might be true; I might be giving up too quickly and not training hard enough.
- My performance might not actually be decreasing, or perhaps not as much as I think. What I am looking at might just be normal variation.
- Maybe I am just getting older.
My latest training was designed to both test and respond to possibility 1, the hypothesis that I have been training too hard. The changes I made were 1) to stop riding my longest ride, a 33 mile/160 minute ride with 1,600 feet of climbing and 2) to listen to my body and either not ride or do easier rides when my legs feel tired, even if that means failing to reach my previous goal of 300 minutes of cycling each week. I do confess that letting go of the 300 minute a week minimum for minutes per week of cycling has been both heartbreaking and discouraging but the logic for doing so is that the hills around my new home make my average ride closer to the vigorous intensity aerobic exercise of the Medical Community than to the moderate intensity I had been assuming so that what I should be shooting for, now that I am riding from my new home, is a minimum of 150 minutes a week.
Earlier, I had made a third change, not in response to this latest slump, but one which is helping me respond to it. That change is to set up my trainer in my bedroom. When I first moved into my new home I noted that finding an easy ride was difficult. My first solution was riding laps around a local recreational lake, a ride I call the Lake Loop. Although that ride is easier than some of my other rides, getting to and from there still involved some significant hills. Looking back at my training log I noted that I rode my last Lake Loop ride on December 1 of 2020 and my first Trainer ride on December 11. Thereafter, 30 minutes on my trainer (boredom prevents anything longer) has replaced 60 minutes of laps around the Lake as my easy ride. These new easy rides are much easier and thus have much less risk of contributing to overtraining.
How is my new, easier schedule working? It is probably too soon to tell, at least with any certainty, but one preliminary data point suggests that overtraining was at least a factor in my recent slump. I first noticed this slump in May of this year when I could not complete the training plan I had devised to prepare to ride the Art of Survival Metric Century. (I will comment on the wisdom of that training plan later in this post.) After taking it a bit easier during June, July, and August, my times on my benchmark Alpine-Like rides increased from below average to just above average in September. In October, an out of town trip and a cold severe enough to keep me off the bike meant I had too few Alpine-Like rides to judge, so I have no confirmation of that improvement. A warning against overinterpreting this one good month comes from the fact that I also had a good month the previous April for no reason I can fathom. Was April a statistical outlier? If so, could September be one also? It definitely could, which is why my caution in coming to a conclusion, but I did find my September results encouraging.
What should I do now?
- Confirm that by reducing my riding I am improving my performance.
- Continue at a reduced level of riding until my accumulated fatigue is gone.
- Develop a schedule I can maintain from my current home.
- Develop a schedule to prepare for metric centuries.
I have been giving some thought to item 4. Some time ago I devoted a whole post to working from a schedule given in “Distance Cycling” by John Hughes and Dan Kehlenbach to allow riding a century or 200K "every month of the year” and modifying it for a metric century a month, taking into account the rides I can actually do here in the hills of California. One step in that conversion was to increase the mileages I initially calculated to make sure I maintained 300 minutes a week of riding. Now that I am questioning that number, it may be time to reconsider those increases and similarly for the somewhat different schedule to get ready for the first metric century of the season. When I looked back on the actual preparation I had done for metric centuries in the past, it was less than I had remembered and less than the plan I had so laboriously developed, another reason for cutting back a bit on my metric century preparation schedule. Of course, if my recent problems preparing for a metric century resulted from illness or old age, then none of this will be effective. Back when I reviewed my last 40,000 miles of riding, I considered a more general version of that possibility and I asked the following question: "Will the Zombie make it to 50,000 miles, and if he does, what cycling adventures will he have enjoyed?" Stay tuned to find out.
Monday, October 18, 2021
What Is Sweet Spot Training?

Polarized Training and Sweet Spot Training are sometimes seen as competing training philosophies. Dr. Stephen Seiler coined the term ‘Polarized Training’ and Frank Overton the term ‘Sweet Spot Training’ but in both cases many others have adopted these philosophies so there is considerable variation in the actual training plans that are derived from each of them. That said, I am going to concentrate on Seiler’s and Overton’s versions of these philosophies. Back in the blog post where I described my discovery of Seiler I also mentioned that my first exposure to Seiler was my first experience getting training information from a podcast and that this medium had a number of advantages as a source of learning. So, in addition to concentrating on Seiler and Overton, I am going to rely primarily on their podcasts because these tend to be more flexible and realistic, giving me, I feel, a better sense of what these different philosophies are in the real world. I am not going to attempt to reference each point I make, rather, I am going to give a couple of general references to Overton podcasts at the end of this post^. (I have previously referenced Seiler podcasts.) Finally, there is a third name I need to mention, Dr. Andrew “Andy” Coggan. Dr. Coggan was one of the pioneers of the use of power meters in training and back around 2004 gathered together a group of athletes, coaches, and scientists to develop systems for using power meter data, a group including Overton, and it was the discussions of this group that Overton used to develop his concept of Sweet Spot Training.
The first thing we need to consider is the similar, specialized audiences for these two philosophies. What these audiences have in common is that they are bicycle racers, road racers in particular. (Later in this post I will discuss some differences in their audiences.) I realized this when I attempted to map these philosophies onto the training advice of the coach I use, Coach John Hughes. To my surprise, I couldn’t do it. What I realized is that Hughes writes mostly for participants in distance challenges, century riders and randonneurs for example. Training for these riders is much more about building endurance than speed. It is not that speed does not matter, but rather that speed is secondary to endurance and that the relevant speed is steady state speed, jumping to join a breakaway or having a sprint at the end of the ride is unlikely to be useful to the riders Hughes coaches. This results in very different training plans than those used by road racers.
So what is Sweet Spot? I have mentioned it before as an Intensity Zone used by Coach Hughes. His basic definition of intensity zones divides intensity levels into seven zones. On top of that basic system, he defines Sweet Spot as extending from the very top of his basic Zone 3 through the bottom half of his basic Zone 4. (For the remainder of this post, when I refer to an intensity zone, I am going to be using the Hughes seven zone system.) Overton defines the intensity level of Sweet Spot more broadly, as 84% to 97% Functional Threshold Power (FTP) which translates to the top half of Zone 3 and almost all of Zone 4 in the Hughes system. Coggan has an even broader definition which includes everything from the top of Zone 2 through the very top of Zone 4.
Sweet Spot is an intensity zone but it is also something more. To put this “something more” into context, both the Sweet Spot and Polarized philosophies have in common a firm commitment to periodized training. A minimal version of race-directed periodization is a Base phase during which aerobic fitness is developed followed by a Build phase during which specific racing adaptations (speed, power) are developed followed by a Taper phase in which a small amount of Fitness is sacrificed to substantially reduce Fatigue in order to maximize performance (Form) followed by the race followed by recovery. The period in this process where the difference between the Sweet Spot and Polarized philosophies is important is during the Base phase. The simplest description of the difference between Sweet Spot and Polarized training is that Polarized training recommends many hours of Zone 2 riding during the Base phase whereas the Sweet Spot philosophy recommends fewer hours of the more intense Sweet Spot intensity training during the Base phase. Both are intended to build an aerobic base and the primary argument between these philosophies is which of these intensities is better at doing that.
In a podcast, Coggan generalized this question in a way I found helpful. He opined that between somewhere in Zone 2 through the top of Zone 4, all that mattered was the product of time and intensity. That is, if Zone 4 has twice the intensity of Zone 2*, 1 hour in Zone 4 has almost exactly the same training effect as 2 hours in Zone 2. My impression (again, from podcasts) is that Seiler would disagree. To explain why, I have to talk about blood lactate levels. What makes doing so confusing is that blood lactate can be used as the basis for an intensity zone system that is very different from the Hughes seven zone system I am using in this post. For that reason, I am going to refer to these as Lactate Brackets rather than Zones.
There are three Lactate Brackets, Bracket 1, 2, and 3 corresponding to low, medium, and high levels of blood lactate and thus intensity. Zone 2 lies in the low Lactate Bracket 1 whereas Zone 4 lies in the medium Lactate Bracket 2 and thus I think Seiler would argue that there is likely to be fundamental physiological differences between them. One consequence of such differences would be that a ride in the Lactate Bracket 2 will produce much more fatigue than a ride in Lactate Bracket 1, thus limiting the amount of training that can be done. Assuming Seiler is correct, given unlimited time to train, an athlete would be able to build up much more aerobic fitness riding in Zone 2 than they could riding in Zone 4 because fatigue would limit the Zone 4 rides long before it will limit Zone 2 rides.
One confounding factor in comparing Sweet Spot and Polarized training is that there tends to be a difference in the intended audience for Polarized and Sweet Spot training. Advocates of both will argue that theirs is the best approach for almost all racers but their primary targets seem to be different subsets of racers. Seiler mostly coaches full time athletes who have almost unlimited time to train. Many of the clients of Overton are amateur athletes who have to fit their training in around a job and family responsibilities. It may well be that Sweet Spot training is better if you have a limited time to train but that Polarized training is better if you have unlimited training time. Also, we must never forget individual variation. It is possible that one athlete may reach a higher peak performance with Sweet Spot whereas another may do so with Polarized Training.
So which is better, Sweet Spot or Polarized? I am far from an expert on the training literature, but so far I have not come across a study that answers that question in a way I find convincing. In a podcast, Dr. Coggan, who is an expert on the training literature, said more or less the same thing. In the first place, it is not even clear what the question is. Is it that which provides the greatest benefit if there are no constraints (e.g. if there is no limit on training time)? Is it that which provides the greater benefit to the greater number of athletes? Is it that which might be problematic for many athletes but which, if applied to the most gifted athletes, would produce the highest level of fitness? How long should the experiment run? For a year? For multiple years? For the length of an athlete’s career? In the second place, the chances of getting the resources needed to do the right experiments are effectively zero. So unless the differences are dramatic we will probably never know the answer.
While investigating Sweet Spot training for this post, I noticed one additional, relatively unrelated aspect of Overton’s approach to training and that is extensive use of a training load model developed by Coggan. This model is most easily available as part of the commercial “Training Peaks” software package. This specific training load model is designed to use power meter data. However, Coggan’s model was originally based on the heart rate-based model of Dr. Edward Bannister, so it should be possible to do the same kind of tracking using heart rate data. As I listened to Overton, I became very jealous of how he could use this model to track the projected impact of each ride on his Form, Fitness, and Fatigue. Was there some way I could do the same thing? If so, would I have to purchase a power meter and the Training Peaks software or could I use a less expensive heart rate monitor and publically available software? As I looked at Coggan and Bannister’s models more closely, I found parts of them with which I disagreed and/or where my age and genetic background would require different parameters than these racer-targeted models used. Could I also customize these models? Although I had originally planned that this would be the last post in this series, I am now planning on writing one more post on these models at some point. Stay tuned.
^ https://fascatcoaching.com/blogs/training-tips/how-i-invented-sweet-spot-training
https://fascatcoaching.com/blogs/training-tips/sweet-spot-training-with-dr-andy-coggan
* As I have previously blogged, I think the difference between Zone 4 and Zone 2 is greater than two-fold, but for the purposes of this illustration, it doesn’t matter, the principle is the same.