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The idea that exercise cannot prevent obesity without a proper diet is very misleading. Yes, if someone eats 7k calories and does not train like an olympian, they are going to gain weight. However, you can consume 5k calories a day whilst exercising(properly) 5 days a week, and remain very trim and "cut" as the term goes. Proper exercise is not popular though, because if it was easy....well everyone would do it.

The idea that "you have to burn more calories exercising than you eat" is 100% false. The calories you burn while exercising make up less than half of the calories you burn because of exercising. Lean muscle mass maintenance caloric requirements exceed adipose tissue requirements by an order of magnitude. Simplified: the more lean muscle mass you have, the more calories your body will burn with zero effort to support that muscle mass.

That said, a proper diet is a great idea for a ton of reasons. I replied only to point out that proper exercise carries a lot of weight(no pun intended).

[lgeorget]

I understand your point but food is not just a sum of calories. Not all food is metabolised the same. Athletes consume a lot of calories but avoid junk food.

Edit: as I read your comment again, actually, I think we mostly agree.