Exercise scientist Dr. Mike Israetel critiqued and analyzed the diet and training of mass monster bodybuilding sensation Markus Ruhl.

Count on health and wellness expert Jillian Michaels to deliver straightforward, no-nonsense diet advice. She shared it all with E! News, starting with the biggest food mistake she sees people make.

Cody Rigsby prioritizes getting enough protein for healthy aging and fitness. Here's his high-protein routine for flexible ...