Do post-workout testosterone and growth-hormone spikes drive hypertrophy? See what controlled human studies show and what to ...

A peptide is a short chain of amino acids, the same building blocks that form larger proteins. The human body produces millions of them, using them to carry messages, control hormones, regulate ...

Learn how to use drop sets for muscle growth, what current meta-analyses show, which exercises fit, and how to avoid turning fatigue into junk volume.

Harley Pasternak, whose clients have included Kim Kardashian, Rihanna, and Robert Pattinson, does resistance training to ...