For reasons I’ll explain in a second, improving my diet became a critical consideration following my stroke. But I had lots of questions about the areas where healthy eating directly conflicts with sports nutrition’s best practices for endurance athletes. I decided to get answers from a professional, and this blogpost summarizes what I got out of consulting a nutritionist for the first time in my life.

This is one of those posts where it’s not clear whether it belongs on my general blog or here on my cycling-specific blog. Since I came at this from a cyclist’s perspective, I decided to post it to the latter, so that other cyclists would more readily find it. But most of this is equally relevant to my non-cycling readers.

Where I Started

The statistics say that 25 percent of stroke survivors will have a second stroke. And, according to the hospitalist who was in charge of me during my hospitalization, the greatest determinant of whether you have another stroke is diet. Survivors who didn’t change to a heart-healthy diet had the most readmissions, in contrast to those who took dietary advice to heart.

What did she specifically advocate? This:

  • Reduce inflammation and chances of developing diabetes by cutting intake of simple sugars
  • Reduce cardiac risks by limiting dietary fat intake, especially saturated and trans fats
  • Avoid hypertension by reducing intake of table salt and highly processed foods
  • Maintain healthy blood volume by staying fully hydrated
Sports Nutrition for Endurance Athletes

That was the first advice I got following my stroke, and – as a Type A personality and someone with an intense fear of stroke – I took her opinions extremely seriously. Even though I’m significantly younger, healthier, and more active than most stroke survivors, improving my diet seemed, at that time, to be a matter of life and death.

However, as an endurance cyclist, two of those strictures are problematic for me. Simple carbs are the preferred and primary fuel for athletes; would I be risking my health by continuing to emphasize them in my diet? And it’s pretty hard to avoid chronic dehydration if you’re riding hard in the Texas sun for a multiple hours every day.

Although I’ve stayed on top of changing dietary recommendations for decades, these contradictory needs convinced me that it would make sense to consult a nutritionist for the first time in my life.

Another factor is that I was very concerned about weight loss. From 2011 through 2022, my body weight stayed in a narrow range, mostly between 76 and 79 kg, averaging out at 77.3. But in the last five months of 2022 I suddenly and inexplicably dropped 6½ kilos (15 lbs). I gained about half of that back, but then lost another 3½ kg in the weeks following my stroke, bringing me down to an adult-era low weight of 71.2 kg (157 lbs). A nutritionist could help me figure out how to stem my ongoing weight loss while simultaneously cutting both carbohydrates and fat out of my diet.

More Medical Advice I Got

I’ve already outlined the alarmist attitude that my hospitalist instilled in me right after my stroke, and where that advice led me.

But I immediately started getting contradictory advice from every other healthcare provider I talked to.

A week after my stroke, I had a followup with my family physician, who told me that nutrition was a long-term concern and not to overdo any drastic changes to my diet. But as a PCP he’s a generalist, so I remained skeptical, while making sure I got a referral to a nutritionist out of him.

A week after that, I had a followup with my neurologist, whose attitude was that nutrition is just about general health and preventing blood clots, which is more of a cardiologist’s domain.

It took another month before a long-awaited meeting with my cardiologist. His attitude was another surprising counterpoint to the hospitalist. He also claimed that diet is purely a long-term concern, saying both “Go eat a pizza if you want,” and “Eating heart-healthy is not the most pleasant thing.”

After all that, I really didn’t know what to think. The obvious consensus was that diet wasn’t the smoking gun that the hospitalist had portrayed. But it was still hard for me to cast aside her staunchly-held opinion, since it was the only obvious thing that I could control.

But maybe my nutritionist would provide a decisive opinion…

My Nutritionist Experience

I’ve never really thought of nutritionists as a highly skilled profession. As I see it, there are two main aspects to the job.

One part is staying up-to-date on the ever-changing “science” – separating genuine dietary knowledge from the deluge of biased pseudo-science – and distilling that down into a form that’s digestible for their uninformed clients.

This would be of some benefit to me. Having paid attention to sports nutrition for 25 years, I’m pretty well-informed. But I’m less up-to-date on heart- and health-related topics, and never had to deal with problematic weight loss. And it’d be nice to get the current scoop on perpetual debates like “Are eggs good or bad?” and “Which is healthier: butter or margarine?”

The other – and possibly larger – aspect to the job is similar to that of a therapist: talking with clients and trying to manage them into growing the self-discipline required to make lasting dietary changes.

As I mentioned above, I’m a Type A; I don’t need external support once I’ve decided to change my behavior. So the coaching aspect of the nutritionist’s job is really of no value to me.

The most valuable and immediate advice she game me was when she confirmed what my other healthcare providers had said: that I didn’t need to approach dietary changes with a crisis response and rigidity, and that no one individual choice is gonna kill you. I didn’t need to eliminate all fats and simple carbs from my diet, after all. I was already living a pretty healthy lifestyle, and the emphasis should be on fitting increasingly beneficial habits into a healthy diet whose results compound over time.

But beyond that high-level advice, after four meetings in five months, I’m still not convinced that a nutritionist brings a ton of expertise and value to the table. My nutritionist mostly just repeated standard advice that variety is most important and that even “bad” foods are okay when taken in moderation.

At the same time, I don’t want to sell her short. I did get some novel, useful information from her that manifested in some dietary changes I wouldn’t have considered otherwise. So let’s take a look at those…

Specific Dietary Recommendations

It’s pointless talking about the changes I’ve made without first reviewing my diet prior to my stroke. After all, I made a number of significant improvements over the years, and those remain a noteworthy part of the overall equation. Here are some positive features of my baseline diet that I’ve observed for some time:

  • Daily multivitamin and psyllium husk fiber supplements
  • Replace full- and low-fat milk with fat-free/skim
  • Virtually eliminate beef intake
  • Never, ever add salt to anything (except corn on the cob)
  • Cook at home; eating out is a rarity
  • Emphasize broccoli as my primary leafy vegetable
  • Replace ice cream with sorbet/sherbet or fruit pops
  • Replace high-fat sauces like alfredo with low-fat tomato sauces like marinara
  • Keep an eye on the ever-changing recommendations regarding eggs, butter vs. oil-based spreads, etc.
  • Reduce or eliminate soft drink intake, replace with fruit juices like OJ, apple cider, lime- and lemonade, and fruit punch
  • No significant intake of caffeine outside of major events and medicinally
  • No alcohol in any form, ever, period

Even after accepting that the hospitalist’s alarmist warning was misguided, I still wanted to make incremental improvements to my diet. Specifically, I wanted to reduce fats, sodium, and simple carbs (beyond my athletic needs). Between my own research and input from my nutritionist and cardiologist, I’ve landed on the following new guidelines:

  • Daily statin prescription to keep cholesterol down, even tho my numbers were never high
  • Daily Omega-3 fatty acid supplements (algae-based rather than fish oil)
  • Whey protein isolate powder supplement
  • Eliminate or curtail high-fat foods, particularly commercially-prepared baked goods, cocoa, frozen pizza, etc.
  • Read labels to select lower-fat chocolate candies, and healthier salty snacks that are baked or use healthier oils like avocado
  • Reduce overall cheese intake, and use 2% milkfat cheese over full-fat
  • Sauté and stir-fry in avocado oil rather than corn or peanut oils (it has a higher smoke point than olive oil)
  • Substitute ground turkey and pork for ground beef
  • Supplement wheat-based pastas with lentil-based
  • Favor lower-sodium soups like corn chowder; at some point start making my own soups
  • Expand meal repertoire by reintroducing or increasing things like:
    • Boiled chicken
    • Oatmeal (with raisins, sunflower seeds, and dried fruits)
    • Baked beans
    • Mashed potato
    • Sweet potato
    • Nuts, especially hazelnuts
    • Apples

Conclusion

Despite having a longstanding interest in sports nutrition, I never bothered consulting a nutritionist until now. I always doubted whether a nutritionist could add any useful information beyond what any self-educated layman could glean from readily-available public sources.

After a 5-month engagement, I mostly stand by that opinion, although it does need to be refined. My nutritionist helped refute the bad advice I got, and provided some suggestions that were truly useful. But those were largely tactical adjustments, rather than significant course changes. So she definitely did add value… just perhaps not as much as I had hoped for from a licensed medical professional.

I’d be temped to conclude that it wasn’t worth the money, but my health insurance covered the entire tab! All it cost me was time, so in that respect I got way more valuable insights than I paid for.

But I’m still skeptical about whether consulting a nutritionist is worth it for most cyclists or your average non-cyclist. If you have a very particular situation, like I did, then perhaps it would be. But if you’re interested enough to have questions about nutrition, you’re probably also motivated enough to find the answers for yourself, rather than pay someone else to do it for you. A nutritionist really isn’t privy to any information that can’t be found elsewhere.

It absolutely does make all kinds of sense for a cyclist to learn the basics of sports nutrition, and there’s no shortage of available material. For myself, my bookshelf includes the fairly lightweight “Bicycling Magazine’s Nutrition for Peak Performance” by Ed Pavelka, and the more comprehensive “Sports Nutrition for Endurance Athletes” by Monique Ryan. But these days there’s ample other sources, too.

That’s it! Now let’s go eat to ride, and ride to eat!

One of the most popular ways of measuring a cyclist's performance on flat terrain is functional threshold power, and Zwift provides riders with three different FTP tests. My FTP is generally around 210-230 watts.

But for those of us who aren’t afraid of hills, the best measure of climbing performance is one's time to climb the Alpe du Zwift, the virtual equivalent of France’s famous Alpe d’Huez. There’s even a highly sought-after “Liftoff” achievement badge for doing the 7.6-mile 3,400-foot climb in under an hour.

While I haven’t been able to break that barrier, I have done 30 ascents, which is enough data for me to draw some inferences. Since my average power on those attempts has varied from 162 to 234 watts, my times have also ranged from from 88 minutes to just under 63 minutes.

Now things start getting really geeky. You have been warned.

You would expect that if I plunked those numbers down on a scatter chart, there’d be a clear relationship between average power and time. And that’s exactly what I found. Then I added a statistical trendline, which matched my data points shockingly well (an r-square of 0.98 for the statisticians in the audience).

Now here’s where it starts getting interesting. Using that line, for any given average power, we can predict — with near-perfect precision — how long the climb would take me. Specifically, my (slightly simplified) equation is:

minutes = (watts - 400) / -2.76

So putting out 200W, I would finish in 73:13. At 220W, I would finish about seven minutes faster, at 65:58. And in fact we see clusters of past results right around those points.

Whether you use the equation or eyeball the trendline, that calculation also works in reverse, starting with a finish time and seeing what power you’d need to hold. So in order to earn the Liftoff badge by doing the ascent within 60 minutes, I would need to maintain an average power of 236.5 watts for an hour.

This does ignore the second variable that determines one’s ascending speed: weight. Conveniently, my weight doesn’t fluctuate much at all, so I can safely ignore it. But someone else with a different weight would have a somewhat different equation.

That’s why climbers focus on power over weight rather than raw power. Their preferred metric is watts per kilogram, or W/kg. If I re-did this chart using W/kg, it should be an even closer fit.

Among riders chasing the Liftoff badge there’s a common shared belief that you have to maintain 3.1 W/kg in order to climb the Alpe in less than an hour. Now we can put that idea to the mathematical test.

My equation says I would need to put out 236.5W. In order for that to equate to 3.1 W/kg, I would have to weigh 76.3kg. Lo and behold, that’s smack in the middle of my normal weight range, and within two pounds of my current weight. So that validates both my trendline equation as well as the common rumor.

To repeat: to climb the Alpe in an hour at my current weight, I’d have to produce 236W. However, my maximum sustainable power has stayed firmly in the 210-230W range. Alternately, rather than increasing my power output I could lose weight and still hit 3.1 W/kg. At 230W, I would have to get down to 164 pounds, which is pretty extreme for me.

After 30 attempts — and approaching 60 years of age — I won’t be disappointed if I never earn that Liftoff badge. But I enjoy analyzing my performances over time and finding the patterns of consistency that underlie them.

I’ve been logging my weight every week since 2011, and the primitive data always left me with the impression that I put a little weight on in the off-season, then trimmed down to “race weight” during the summer. But I wasn’t really sure…

So I did what any OCPD data junkie would do and made a pivot table to average those six years worth of body weight data and charted the result. Here’s what my average year looks like:

Not wanting to humiliate anyone, rather than disclosing my weight, I’ve labeled my seasonal weight change as pounds above and below my long-term average weight.

Now, what did I learn?

First, it sorta confirmed my hypothesis of seasonally-correlated weight gain and loss. I do gain a little weight in the winter, and lose it in the summer.

However, as the flatness of the curve shows, the range of variance is surprisingly narrow. Leaving aside specious outliers, we’re basically talking about a range of plus-or-minus two pounds from average. So that big seasonal swing usually amounts to a total of just four pounds.

But the thing that most surprised me was that the timing was off.

I expected my weight loss to begin in February, when I typically commit to my training diet, and to start gaining it back in August, after all my major events are done and I take full advantage of being free of those dietary restrictions.

But in reality the transitions occur a couple months later than expected. Even though I start dieting in February, I keep gaining weight until May; and although I end my training diet in August, I keep losing weight until mid-November!

The poor correspondence between dieting and weight confused me for a minute, until I realized that there’s something else that has a better correlation with this data: my cycling.

Due to the weather, I don’t start riding in February; the overwhelming bulk of my riding takes place between late April and the beginning of December. Taking that into account, my seasonal weight change is far more closely correlated with my activity level during the cycling season than with my self-imposed training diet.

Obviously correlation doesn’t imply causation, and I don’t know if the same result would hold for anyone else, but I found that really interesting.

With nearly fifty international victories in a sport where body mass is a primary disadvantage, and his name enshrined forever in everyone’s minds as THE WORLD’S GREATEST ATHLETE™, you’d think Lance Armstrong would be one svelte dude.

Not so much. In fact, my body-mass index (BMI) is actually much lower than Lance’s.

At 165 pounds, Lance’s racing weight is exactly the same as my trained weight. Since I’ve got six inches of height over him, my BMI (a simple calculation based on weight divided by height) of 20.1 is significantly lower than his middle-of-the-road 23.7. At his height (5’10”), Lance would have to lose another 25 pounds to have a BMI as low as mine, tipping the scales at a mere 140 pounds!

And before his bout with cancer, Lance was listed as weighing 185, which puts his pre-cancer BMI at a stunningly flabby 26.5 at a time when he earned about 20 percent of his race wins…

Sure, all this probably says something about the shortcomings of BMI as a measure of fitness, but I’m not about to stop telling people that my BMI is 25 pounds “leaner” than Lance Armstrong’s!

There are heroes, and then there are superheroes.

I first started riding with the folks at Quad Cycles in 2002, seven years ago. Even back then, the ebullient guy who led the rides was already a living legend. The name Bobby Mac will evoke a smile from anyone who has ever ridden in the exceedingly popular triangle formed by the towns of Arlington, Lexington, Bedford, Concord, and Carlisle.

Bobby Mac

Although Bobby’s rides can be whatever you make of them, they’re primarily oriented toward charity riders, and Bobby does an amazing job encouraging novices. He passes on his cycling wisdom by routinely barking out phrases such as “Ride with love in your hearts and smiles on your faces,” or “Be nice to everybody you meet out there”, as well as gems like “If you’re gonna fall, do not fall on me!”.

He is a charismatic leader who never speaks ill of anyone, and his demeanor is always oriented toward fun. Despite riding the exact same route hundreds and hundreds of times over the years, he still finds the enthusiasm to sing a modified version of a 1987 Was (Not Was) song in tribute to his favorite hill, “The Dinosaur”, so named because of a sculpture at the mini-golf course at its summit. Bobby has also named the statue “Sarah”, because he’s Bobby: he can do that.

Bobby barks a lot, but it’s all out of love for the sport and his fellow man. While he casually tosses out aphorisms like “Indifference to the plight of others is a sin”, he backs that up with action, participating in rides that benefit causes from AIDS research to cyctic fibrosis. He even helped organize the Massachusetts Red Ribbon Ride, which carried on the tradition of the former AIDS Rides after Pallotta Teamworks’ criminal mismanagement came to light. Several magazines and newspapers have run features on him and his work.

As you might imagine, Bobby’s an amazingly strong rider, too. But to hear him tell it, it wasn’t always like that. He came to biking when he was over 300 pounds and unable to make it more than a couple miles without collapsing from the effort. Biking helped him lose weight and recover his overall fitness, which he maintains despite his off-season job as a chef for one of MIT’s fraternities. It only adds to his mystique that although he works with food, no one has ever seen him ingest anything but Cytomax.

Bobby Mac

Bobby’s been our leader for so long that it’s difficult to think there could ever be a day when he won’t be there at the head of our pack. But as much as none of us want to face it, that day is inevitably coming. Bobby has macular degeneration, which causes a loss of vision in the center of the field of vision while leaving most of one’s peripheral vision unaffected. As you might imagine, this isn’t good for a cyclist, especially considering Boston’s monstrous roads and notorious drivers. It’s something Bobby has worked around, but who knows how long that will suffice?

In addition, last week Bobby celebrated his 60th birthday. While 60 is hardly ancient, and it’s not difficult to find 70 and even 80 year old riders, it again raises that question in one’s mind of how much longer Bobby will be able to ride.

On June 17 2006, we held an emotional ride in appreciation of Bobby’s tutelage, and called it the Tour de Mac. Last weekend we held another celebratory ride to observe Bobby’s 60th as well as the grand reopening of Quad Cycles, which has moved into new digs about a half mile closer to town. Although the early April morning was cold and the forecast promised rain, the sun came out and provided a fittingly beautiful day for an early season ride with good friends, and perhaps fifty people turned out, including former US Professional Road Race Champion Mark McCormack.

Bobby Mac deserves recognition for the inestimable amount he has done for cycling in the region. He inspires everyone he comes into contact with and is the undisputed and irreplaceable center of our cycling community. He’s nurtured hundreds of new cyclists, and mentored nearly as many charity riders, and done so with gentleness and flair. Like scores of others, I’ve grown as both a cyclist and as a person in the past eight years as a result of my contact with Bobby Mac and the community he created. He is truly one of the greatest heroes I’ve had the pleasure to meet, and I’m thankful for every day I am able to ride with such an inspiring examplar.

I’ve wanted a heart rate monitor (HRM) for many, many years. They’ve been the gold standard for cyclist training tools for a long time, notwithstanding the recent trend toward power meters.

However, they’re somewhat expensive, and I never felt justified in spending the money. Plus I feared it would be like the cadence sensor: useful only for a short period of time, enough to calibrate one’s own internal sense, and extreaneous thereafter.

However, prices have come down, and an HRM would have been handy indeed for my wintertime indoor trainer workouts. So I finally picked up a cheap Sigma Sport PC14 on sale at the Noshbar.

Cheap is the word. Any electrical field will cause the unit to either register a pulse of zero or over 200: a near impossibility for someone my age. So I can’t really trust it to record the max heart rate I hit during any given workout. Unfortunately, your max is what all the training heart rate zones are based off, so I’m fiddling with it to find my true max.

Here’s my initial observations. They’re based on only two days’ worth of use, so they’re highly provisional.

heart rate monitor

Resting heart rate, taken before getting out of bed in the morning, is a good indicator of general fitness. A sedentary person might have an RHR in the range of 60-80 beats per minute, while a trained cyclist would be closer to 45-55, so lower is usually better. I’ve seen a low of 51 bpm, and a sustained reading of 53, so that’s in line with my expectations. I remember taking my pulse in high school when I was bored and getting resting rates below 48.

Max heart rate is largely a function of age, and the standard formula for estimating it is to subtract your age from 220, but that will then vary based on your fitness level, with higher numbers being better. A 45 year-old’s expected values range from 164 to 186 bpm, and although I predicted I’d max out at 165, I’ve seen readings as high as 171. That’s in line with the base formula, although again that’s preliminary and more testing is required.

Using that as a base, I derived several additional numbers. My aerobic limit is around 120 bpm (70% MHR), and recovery rides should stay below 140 bpm (80% MHR). My lactate threshold should be somewhere between 140 and 155 (80-90% MHR).

The most interesting thing I’ve learned so far is that you can do easy aerobic training or you can do hard, painful interval training, but you derive very little training benefit in the middle ground between them. Below 70% MHR you’re burning mostly fat and can go all day; above 85% MHR you’re burning glycogen and building up lactic acid and need to rest and recover every few minutes; but in that grey area between 80-85% MHR, you’re working way too hard to burn any fat, but not hard enough to exercise your VO2 and ability to buffer and clear lactic acid. So that’s a dead zone you should avoid training in; for me, that area is from about 137-145 bpm. In short: go easy or go hard, but don’t go halfway.

For anyone trying to lose weight, that information is incredibly important. You’re always drilled with the value of exercise— particularly aerobic exercise—in losing weight, but there’s a huge mental trap there. Although aerobic exercise raises your heart rate, it doesn’t raise it enough for it to feel hard. Since most people think “harder is better”, they’ll often push themselves and work out in this middle ground, where they’re working hard, but not all-out. Unfortunately, at that level you’re only burning glycogen, not fat, and you’ll just crave sugar to replenish your blood and liver glucose levels. To lose weight, you have to do gentle exercise for very long periods of time, and it shouldn’t feel very difficult at all.

It’s similar to one of the problems I observe in novice cyclists. They get on a bike and mash down on the pedals at a knee-shattering 60 rpm. They think you have to work hard to make the bike go, or that you’re not exercising unless it’s hard work. It’s counterintuitive to a new rider, but selecting a very light gear that you can turn over easily is not only less effort and better aerobic exercise, but it’s also more efficient, and will save your knees, which harder efforts will damage.

So that’s the report on this year’s new toy. I’ll be curious to get more data from it over time, and particularly to see whether it provides me with useful information that will help me marshal my physical resources during longer rides.

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