And what Taubes leaves out of this fine article is the fact that you have to subtract the amount of calories you'd burn anyway from the total burned doing exercise simply doing nothing.
1 hour treadmill run = ~300 calories burned.
1 hour sitting on rump = ~100 calories burned.
300-100 = 200 additional calories burned (mainly from sugar not stored body fat).
3,500 calories in a pound of fat.
3,500 -:- 200 = 17.5 days it would take you exercising to lose one pound of fat.
200 calories is a half of a banana and a small glass of skim milk.
Oh - and as you get more fit the amount of calories burned for that same hour goes down as heart rate doesn't go up as much and the entire hour is just easier. Easier efforts burn less calories than harder efforts for the same time frame.
So now you have to run longer or faster or both.
Where is that orthopedic doctor's phone number?