Effects of creatine, coffee, and caffeine anhydrous on strength and sprint performance Public Deposited

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  • March 19, 2019
Creator
  • Trexler, Eric
    • Affiliation: College of Arts and Sciences, Department of Exercise and Sport Science
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 (P<0.05). CRE loading (five days) did not improve strength or sprint performance compared to placebo (P>0.05). 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.
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  • In Copyright
Advisor
  • Persky, Adam
  • Smith-Ryan, Abbie
  • Ryan, Eric
Degree
  • Master of Arts
Degree granting institution
  • University of North Carolina at Chapel Hill Graduate School
Graduation year
  • 2015
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  • Chapel Hill, NC
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