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Celebrity trainer Gunnar Peterson gives his advice on pain-free squats.
Strengthening this 'guardian muscle' will prevent injury.
Put your hamstrings under fire.
It’s so much more than a position change.
Feel the burn in every fiber of your leg muscles.
Develop your skills with this major-league routine.
10 kettlebell workouts to build your lower body.
This CrossFit-inspired routine will max your pain threshold.