EFFECT OF CREATINE SUPPLEMENTATION ON TIME TO FATIGUE IN THE ANAEROBIC WINGATE TEST

J.R. Reeder, K. Kazubinski, A. Foreman, M. Crauthers, & M. Lockard Willamette University, Salem, OR During supramaximal exercise, the body initially relies on creatine phosphate (CP) for ATP synthesis. Supplementation with creatine monohydrate has been shown to increase intramuscular CP concentrations, which subsequently increases peak power, and mean power, as well as decreases time to peak power and fatigue index in a Wingate test. There is limited research on creatine monohydrate supplementation and time to fatigue in anaerobic exercise. PURPOSE: To determine if creatine monohydrate supplementation affects time to fatigue on a supramaximal bike test. METHODS: Eight active and healthy participants completed a modified Wingate cycle ergometer test, followed by either creatine monohydrate or placebo supplementation for five days. After supplementation the cycle ergometer test was repeated. Peak power and time to fatigue were recorded. RESULTS: The supplemented group had a change of 50.0W +/- 46.0W in peak power and 5.50s +/- 16.29s in time to fatigue between tests. The placebo group had a change of -63.25W +/- 151.5W in peak power and 2.75s +/- 19.86s in time to fatigue between tests. Difference in time to fatigue and peak power was not statistically significant between groups (p= 0.82 and p=0.23 respectively). CONCLUSION: Creatine monohydrate supplementation is ineffective at increasing time to fatigue in anaerobic exercise.