**Be sure to foam roll calves/quads/hamstrings and warm up with dynamic movements prior to any strength training**
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I recommend you begin this, or any single leg movement, with body weight until you can complete 3 sets of 8-10 repetitions keeping your hip & spine in alignment.
Be sure to hinge from your hip and not bend from your knee, and stand up by engaging your glute vs. pulling from your back.