Building muscle depends on several factors and isn't something that'll happen overnight after just one workout.

Toning your body, and especially your bum, has a lot of physical benefits - overall strength, posture, ability to properly sit, stand, run, walk, jump, and hike. And so, for lower back stability, you ...

Story by Brad Schoenfeld, Ph.D, C.S.C.S., Cori Ritchey, C.S.C.S., Jake Boly, C.S.C.S. YOU MIGHT BE STEPPING back into the gym ...