Forskning

February 23, 2016

The effect of coffee and caffeine ingestion on resistance exercise performance

D L Richardson and N L Clarke, 2016, The effect of coffee and caffeine ingestion on resistance exercise performance, Journal of Strength and Conditioning Research, published online ahead of print.

ABSTRACT:
The aim of the present study was to determine the effect on performance of ingesting caffeine-dose matched anhydrous caffeine, coffee or decaffeinated coffee plus anhydrous caffeine during resistance exercise. Nine resistance trained males (Mean±SD age: 24±2 years, weight: 84±8kg, height: 180±8cm) completed a squat and bench press exercise protocol at 60% 1-RM until failure on five occasions consuming either, 0.15 g·kg caffeinated coffee (COF), 0.15 g·kg decaffeinated coffee (DEC), 0.15 g·kg decaffeinated coffee plus 5 mg·kg anhydrous caffeine (D+C), 5 mg·kg anhydrous caffeine (CAF) or a placebo (PLA). Felt arousal and rating of perceived exertion (RPE) were used to assess perceptual variables and heart rate (HR) to assess physiological responses between trials. There were significant differences in total weight lifted for the squat between conditions (P<0.01; ηP =0.54) with a greater amount lifted during D+C compared with DEC (P<0.01), CAF (P<0.05) and PLA (P<0.05) conditions. Total weight lifted during the COF condition was significantly greater than PLA (P<0.01), although not significantly greater than the amount of weight lifted during the DEC condition (P=0.082). No significant differences were observed in total weight lifted in the bench press protocol between conditions (P=0.186; ηP =0.17). Significant differences in HR (P<0.01; ηP =0.39), but not RPE (squat: P=0.690; ηP =0.07; bench press: P=0.165; ηP =0.18) and felt arousal (P=0.056; ηP =0.24) were observed between conditions. Coffee and decaffeinated coffee plus caffeine have the ability to improve performance during a resistance exercise protocol, although possibly not over multiple bouts.