Q: I heard that you guys prescribe high-rep sets to etch in muscle cuts. That’s wrong. I’m a certified personal trainer, and I learned that high reps do not make a muscle more defined. You can only do that with diet to thin your skin.

A: You’re correct that higher-rep sets don’t “etch in muscle cuts” per se; however, as we discuss in our Fat-to-Muscle e-book, high-rep sets, 15 to 20, do heighten muscle burn, and that lactic acid surge can increase growth hormone output. [Can J App Phys. 22:244-255. 1997.] GH has been shown in research studies to be an extremely potent fat burner. In other words, it thins the skin by reducing subcutaneous fat—and that eventually gives you more muscle detail.