> Four months ago my friend John Sharkman stepped on the scale and realized he was the heaviest he'd ever been. Sharkman—a former college football quarterback—w

> Four months ago my friend John Sharkman stepped on the scale and realized he was the heaviest he'd ever been. Sharkman—a former college football quarterback—was weighing in at 263 pounds, fifty pounds heavier than his time as an elite athlete...It's not like walking is some secret. 10,000 steps is the default recommendation of some of the most popular fitness trackers on the market, and long walks have been a hidden weapon of superhero body transformations for ages. But until witnessing Sharkman undergo his transformation I didn't realize just how powerful just walking could be...So in our group chat, Sharkman and a few other friends made a commitment to walking 10,000 steps a day and tracking our food. We aimed for about 2,000 calories. Sharkman dubbed the initiative Health Zone. After four months following those guidelines, my friend dropped 43 pounds. Collectively the group chat was down 105. So in other words, a single individual, who already had a history of being fit and the ability to pursue athletics at a high level, reverted to his mean, and made up almost half of the entire gains across 4+ ('a few other') people, by using bog-standard recommendations, of the sort that have completely failed to solve the obesity crisis and fail for most people that try it. What can I say to a writeup like this, which is so self-refuting? "Nothing in psychology makes sense except in the light of individual differences." How can fitness journalists and 'nutrition coach and personal trainer' experts be so blind to the reality of individual differences? Just look at exercise studies's summary statistics, and look at how different the results are for individuals doing the same thing!