 The baseline assessment involves measuring muscular power during 5 sets of 15 repetitions of knee extension on a dynamometer, with each set separated by 1 minute rest, with each leg tested separately. Additional measures include assessment of body composition and body water content. Participants will then receive either oral creatine 21 gd or placebo for 7 days. One leg of each participant will be randomized to receive topical creatine 3.5 mLd and the opposite leg placebo for 7 days. The same assessments as done at baseline will then be repeated after the 7 days of creatine supplementation. 