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Título
Effects of Caffeine Supplementation on Power Performance in a Flywheel Device: A Randomised, Double-Blind Cross-Over Study
Autor
Facultad/Centro
Área de conocimiento
Título de la revista
Nutrients
Número de la revista
2
Datos de la obra
Castillo, D., Domínguez, R., Rodríguez-Fernández, A., & Raya-González, J. (2019). Effects of caffeine supplementation on power performance in a flywheel device: a randomised, double-blind cross-over study. Nutrients, 11(2). https://doi.org/10.3390/NU11020255
Editor
MDPI
Fecha
2019
Abstract
[EN] Despite the demonstrated evidence of the importance of eccentric contractions in sports
performance, no research has evaluated the ergogenic effects of caffeine on this type of contraction
means during flywheel exercises. Therefore, the aims of the present study were to compare the
power outcomes, using different inertial loads, between caffeine and placebo conditions. Twenty-four
young, healthy, and active men (age: 22.5 4.8 years) took part in the study. A crossed, randomised
double-blind design was used to analyse the effects of caffeine on lower limb power outcomes during
a flywheel half-squat exercise. Participants completed four sets of eight all-out repetitions with a
fixed three-minutes rest interval, and each set was performed using different inertial loads (i.e., 0.025,
0.050, 0.075 and 0.100 kg m2). Both the mean power (MP) and peak power (PP) in concentric (CON)
and eccentric (ECC) movement phases at each inertial load were recorded after participants were
administered either a caffeine supplement (6 mg kg1) or placebo (sucrose). Participants receiving
a caffeine supplementation demonstrated improvements versus the placebo in total MP (MPtotal),
as well as MP in CON phase (MPcon) and in ECC phase (MPecc) at each inertial load (22.68 to 26.53%;
p < 0.01, effect size (ES) = 0.89–1.40). In addition, greater improvements with caffeine ingestion
were obtained with respect to the placebo condition (18.79 to 24.98%; p < 0.01, ES = 1.03–1.40) in
total PP (PPtotal), as well as PP in CON phase (PPcon) and in ECC phase (PPecc) at each inertial load.
Thus, the supplementation of 6 mg kg1 caffeine may be considered to maximise on-field physical
performance in those sports characterised by high demands of resistance.
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