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This quick-fire circuit will stack some mass on to your back end.
Put your hamstrings under fire.
Feel the burn in every fiber of your leg muscles.
Develop your skills with this major-league routine.
The golden rule of this circuit: You can't put the weights down.
10 kettlebell workouts to build your lower body.
Crush your quads while strengthening your hip flexors.
You can't spot-reduce, but you can muscle-produce.