Herbalife fitness expert, Samantha Clayton shares her advice to help you become more active and consequently, happier. Most people think their quads are doing all the work during a run. Running is a pulling action that involves using your hamstrings. Athletes that are quad dominant can improve speed and technique by doing more hamstring work. Sprinter Samantha Clayton shares her tips to build stronger hamstrings.
Samantha Clayton is the lead instructor on the new 24Fit Workout
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