mens' health magazzine said there is an average 7% surge in testosterone after ejaculation, so that's not it... i have heard this before, and most people i know who have tried this said that ejaculation has nothing to do with performance(or at least on the bike ) over two weeks, maybe it was just your training and fitness improving? maybe you ate a little healthier during that time? there are so many other factors that could affect your performance that you, adn most people, probably don't keep close tabs on.