I read Tara Parker-Pope’s NYT Magazine story on weight loss, and a dozen thoughtful blog followups (most notably Ta-Nehisi Coates’ and Megan McArdle’s extensive responses).
I’ve heard increasing noise in the press over the past year about the emerging consensus that there isn’t necessarily the strong causal link between weight loss and longevity that everyone thought, except possibly for people with dire obesity problems. Most people, even most “fat people,” don’t have dire obesity problems; they (we) are somewhere in the BMI range between about 27 and 33, making us “overweight” and “obese” but not ginormous.
Speaking for myself, I could do to lose up to about 35 or 40 pounds (i.e., up to about a sixth of my current size) without looking unhealthy or radically changing my body shape. And I did lose about 30 pounds a year ago, but (just as Parker-Pope suggests) I gained it all back once I lost the will to micromanage what, when, and how much I was eating.
However, that year-long experiment has left me permanently healthier. I’ve permanently lost at least 10 pounds of fat around my middle (the most dangerous kind to carry), replacing it with a roughly equal weight of muscle on my thighs. I’ve made incremental but apparently permanent changes to the way I eat: on balance, more vegetables and fruits, proportionally more protein, less carbs (especially in the morning). And, most importantly, I’ve discovered bicycling, a type of moderate exercise I’m not just willing but eager to engage in almost every day for almost an hour; on average, I’m now biking 50 miles a week.
Now, biking 50 miles a week won’t lead to weight loss, at least for me. Perhaps paradoxically, the fact that I do it so consistently has left me in better physical shape to such a degree that my most frequent stretch of ride (the 2.5 miles between home and work) no longer provides sustained aerobic benefit. I get out of breath, I get my heart pumping, but I’m not suffering. On the other hand, isn’t that the point — to develop healthy habits that stick, becoming routine rather than burdensome? I’ve developed a healthy habit that I derive pleasure from sustaining, and which has positive-feedback effects (for instance, on the days I ride, I tend to eat less, not more, and I crave fresh fruit, which I now keep in the house).
I would like to be thinner. On the other hand, weighing all the studies against each other, I suspect that I get more than enough benefit from biking 50 miles a week (and possibly much more than enough) to overcome the “drag” imposed by those extra 30 or 40 pounds. And, based on my experience, losing 40 pounds and keeping them off would require a degree of dedication that would be highly disruptive to my life. I suspect that when I go in for my physical this year, my cholesterol levels and other bloodwork will look good, and I can guarantee that if they put me through a cardiac stress test, I’ll ace it — and that’s something that in my whole life, until last year, I would never have been able to say. So, in keeping with my 2012 resolutions, let’s celebrate that success of mine, which may prove to be life-extending.