The 'Godfather of Bodybuilding' Charles Glass revealed his best protein source for gains and discussed his top exercise to build muscle.

ATHLEAN-X founder Jeff Cavaliere discussed how to effectively build better arms while sharing the perfect science-backed bicep workout.

Dumbbell spider curls place your muscles fully in a peak contracted position. At the top of the exercise, your muscles experience maximum resistance because they are most perpendicular to gravity, ...