Habitual Caffeine Consumption Does Not Interfere With the Acute Caffeine Supplementation Effects on Strength Endurance and Jumping Performance in Trained Individuals

The long-standing caffeine habituation paradigm was never investigated in strength endurance and jumping exercise performance through a straightforward methodology. The authors examined if habitual caffeine consumption would influence the caffeine ergogenic effects on strength endurance and jumping...

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Bibliographic Details
Published in:	International journal of sport nutrition and exercise metabolism Vol. 31; no. 4; p. 321
Main Authors:	de Salles Painelli, Vitor, Teixeira, Emerson L, Tardone, Bruno, Moreno, Marina, Morandini, Jonatas, Larrain, Victória H, Pires, Flávio O
Format:	Journal Article
Language:	English
Published:	United States 01-07-2021
Subjects:	Adult Athletic Performance - physiology Caffeine - administration & dosage Caffeine - pharmacology Central Nervous System Stimulants - administration & dosage Central Nervous System Stimulants - pharmacology Cross-Over Studies Dietary Supplements Double-Blind Method Humans Male Muscle Strength - drug effects Muscle Strength - physiology Muscle, Skeletal - drug effects Muscle, Skeletal - physiology Pain Measurement - methods Performance-Enhancing Substances - pharmacology Physical Endurance - drug effects Placebos - administration & dosage Placebos - pharmacology Purinergic P1 Receptor Antagonists - administration & dosage Purinergic P1 Receptor Antagonists - pharmacology Resistance Training Sports Nutritional Physiological Phenomena Young Adult ergogenic power muscle endurance placebo
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Summary:	The long-standing caffeine habituation paradigm was never investigated in strength endurance and jumping exercise performance through a straightforward methodology. The authors examined if habitual caffeine consumption would influence the caffeine ergogenic effects on strength endurance and jumping performance as well as perceptual responses. Thirty-six strength-trained individuals were mathematically allocated into tertiles according to their habitual caffeine consumption: low (20 ± 11 mg/day), moderate (88 ± 33 mg/day), and high consumers (281 ± 167 mg/day). Then, in a double-blind, crossover, counterbalanced fashion, they performed a countermovement vertical jump test and a strength endurance test either after caffeine (6 mg/kg) and placebo supplementation or after no supplementation (control). Perceptual responses such as ratings of perceived exertion and pain were measured at the termination of the exercises. Acute caffeine supplementation improved countermovement vertical jump performance (p = .001) and total repetitions (p = .004), regardless of caffeine habituation. Accordingly, analysis of absolute change from the control session showed that caffeine promoted a significantly greater improvement in both countermovement vertical jump performance (p = .004) and total repetitions (p = .0001) compared with placebo. Caffeine did not affect the rating of perceived exertion and pain in any exercise tests, irrespective of tertiles (for all comparisons, p > .05 for both measures). Caffeine side effects were similar in low, moderate, and high caffeine consumers. These results show that habitual caffeine consumption does not influence the potential of caffeine as an ergogenic aid in strength endurance and jumping exercise performance, thus challenging recommendations to withdraw from the habitual caffeine consumption before supplementing with caffeine.
ISSN:	1543-2742
DOI:	10.1123/IJSNEM.2020-0363