University of North Carolina at Chapel Hill Graduate School
Doi
Abstract
The current study sought to directly compare effects of caffeine-matched (300 mg) doses of caffeine anhydrous (CAF) and coffee (COF) on strength and sprint performance, and to determine if CAF or COF intake modulate the effects of creatine (CRE) loading. Resistance-trained males (n=54) completed baseline tests of strength and sprint performance, with post-tests occurring after acute and chronic supplementation periods. COF ingested 30 minutes pre-exercise improved leg press one-rep max to a greater extent than CAF (32.2±18.6 vs. 15.3±16.9 lbs; P=0.03), while both attenuated total work and peak power reductions compared to placebo (P0.05). Effects of CRE were not influenced by chronic COF or CAF intake, but the combination of CRE+CAF resulted in mild gastrointestinal discomfort. Results may inform supplement dosing and timing strategies for concurrent use of CRE with CAF or COF.Master of Art
