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

by Trexler, Eric T., M.A., THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL, 2015, 91 pages; 1589127


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.

AdviserAbbie E. Smith-Ryan
Source TypeThesis
SubjectsNutrition; Kinesiology
Publication Number1589127

About ProQuest Dissertations & Theses
With nearly 4 million records, the ProQuest Dissertations & Theses (PQDT) Global database is the most comprehensive collection of dissertations and theses in the world. It is the database of record for graduate research.

PQDT Global combines content from a range of the world's premier universities - from the Ivy League to the Russell Group. Of the nearly 4 million graduate works included in the database, ProQuest offers more than 2.5 million in full text formats. Of those, over 1.7 million are available in PDF format. More than 90,000 dissertations and theses are added to the database each year.

If you have questions, please feel free to visit the ProQuest Web site - http://www.proquest.com - or contact ProQuest Support.