Q: Most of the programs in your e-books don’t have a lot of work sets. Pro bodybuilders use a lot more volume than you recommend, and they’re obviously pretty huge and ripped. Are there any studies that prove less time in the gym is good or that show the best number of sets for a workout?

A: Too much stress, whether in relationships, in the gym, or on a bungee-jumping platform, causes cortisol to surge. Cortisol is a stress hormone that can force your body to eat muscle tissue for energy. Not good! And it lowers testosterone, which also can cause muscle loss (not to mention a lower sex drive). A study that looked at how training volume affects testosterone in men was done several years ago (Alemany, J.A., et al. Med Sci Sports Exerc. 36:S238)… [Read more…]