Back Squat 1-1-1-1-1-1-1 reps
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Don’t have a bar, or a rack to take weight off? Try doing one legged squats (aka ‘pistols’). The non-supporting leg should be pointed straight forward and parallel to the ground through the entire squat. Weight can be added as needed (anything that has mass can be used). Be careful with form, and don’t let the knee of the supporting leg go past the toes.