Exercise and Weight Loss: Shouldn't somebody see if there's a relationship? (stat.columbia.edu)

One possible reason people are reluctant to study this: high-intensity exercise is, or seems to be, much more dangerous.

I sent a marathon-runner this:

http://lupoleboucher.livejournal.com/30217.html

She tried it once, threw up, and could do any serious exercise for about a month and a half.

"studies that claim that exercise doesn't lead to weight loss, and noticed that the exercise intensity is quite low. For instance, one of the studies had people exercise for an hour at "55% of aerobic capacity"; a different study had people exercise at "70% of maximum heart rate."