It might not be such a good idea to think sex can be a substitute for a session at the gym. A recent insight has found that it is a myth that one can burn up to 300 calories with sex. An average session of sex which lasts about six minutes burns only about 21 calories.
David Allison, a biostatistician at the University of Alabama at Birmingham, delved deep into such popular health beliefs to dispel some famous myths.
He found that sex lasted only about six minutes on an average and the energy output was probably about 20 calories, perhaps just the same as a quick walk.
He also verified other myths - for instance skipping breakfast has always been associated with weight gain. He found that weight gain by skipping breakfast depended upon whether people are actually used to skipping breakfast.
He also found that snacking actually did not have a detrimental effect on weight and that those who lost weight sooner into their exercise schedule, could actually manage their weight better, than those who had taken their time to slim down.