Caffeine ingestion acutely enhances muscular power and energy however not muscular endurance in resistance-trained males.
Eur J Sport Sci. 2017 Sep;17(eight):1029-1036
Authors: Grgic J, Mikulic P
The purpose of this randomized, double-blind, cross-over examine was to evaluate the acute results of caffeine ingestion on muscular power and energy, muscular endurance, price of perceived exertion (RPE), and ache notion (PP) in resistance-trained males. Seventeen volunteers (imply?±?SD: age?=?26?±?6 years, stature?=?182?±?9?cm, physique mass?=?84?±?9?kg, resistance coaching expertise?=?7?±?three years) consumed placebo or 6?mg?kg-1 of anhydrous caffeine 1?h earlier than testing. Muscular energy was assessed with seated drugs ball throw and vertical leap workout routines, muscular power with one-repetition most (1RM) barbell again squat and bench press workout routines, and muscular endurance with repetitions of again squat and bench press workout routines (load equivalent to 60% of 1RM) to momentary muscular failure. RPE and PP have been assessed instantly after the completion of the again squat and bench press workout routines. In comparison with placebo, caffeine consumption enhanced 1RM again squat efficiency (+2.eight%; impact dimension [ES]?=?zero.19; p?=?.016), which was accompanied by a lowered RPE (+7%; ES?=?zero.53; p?=?.037), and seated drugs ball throw efficiency (+four.three%, ES?=?zero.32; p?=?.009). Enhancements in 1RM bench press weren’t famous though there have been important (p?=?.029) decreases in PP associated to this train when individuals ingested caffeine. The outcomes level to an acute good thing about caffeine consumption in enhancing lower-body power, possible on account of a lower in RPE; upper-, however not lower-body energy; and no results on muscular endurance, in resistance-trained males. People competing in occasions through which power and energy are vital performance-related components could think about taking 6?mg?kg-1 of caffeine pre-training/competitors for efficiency enhancement.
PMID: 28537195 [PubMed – indexed for MEDLINE]