Thirty minutes of sex burns 85 calories or more. It may not sound like much, but it adds up: 42 half-hour sessions will burn 3,570 calories, more than enough to lose a pound. The number of calories burned during sex is about the same as the number burned by walking at 2 miles per hour.
Bend in the sessions of 30 minutes, you can lose that pound in 21 sessions of one hour.
