Targeted Muscle Group: Heart, Legs How to do stationary sprints step by step: Begin in the standing position Raise and lower one knee at a time as if running in place. Alternate legs and go as fast as you can
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We're Alex & Tim Ruben. Former Division 1 college football athletes turned NASM Certified Personal Trainers specializing in HIIT and fat loss. We’re here to teach you everything you need to know about getting and staying fit in less than 20 minutes a day!
