Prepare to preform. Skiers, snowboarders and cyclists report the most dramatic benefits, followed by competitive short- and long-distance runners. Weightlifters tell us they can get 50% more repetitions in a set before the "burn" stops them. Climbers, Supercross racers and national champion downhill mountain bike racers use SportLegs to beat "arm pump." Our loyal customers include triathletes, soccer players, NFL quarterbacks, pro hockey players, lacrosse players, collegiate rowing teams, Navy SEAL instructors, bodybuilders, surfers, swimmers, national champion speed skaters, golfers and equestrians.