%0 Journal Article
%T Dose response effects of a caffeine-containing energy drink on muscle performance: a repeated measures design
%A Juan Del Coso
%A Juan Jos¨¦ Salinero
%A Cristina Gonzalez-Millan
%A Javier Abian-Vicen
%A Benito Perez-Gonzalez
%J Journal of the International Society of Sports Nutrition
%D 2012
%I BioMed Central
%R 10.1186/1550-2783-9-21
%X In a randomized order, twelve active participants ingested 1 and 3£¿mg of caffeine per kg of body weight using a commercially available energy drink (Fure£¿, ProEnergetics) or the same drink without caffeine (placebo; 0£¿mg/kg). After sixty minutes, resting metabolic rate, heart rate and blood pressure were determined. Then, half-squat and bench-press power production with loads from 10 to 100% of 1 repetition maximum was determined using a rotator encoder.In comparison to the placebo, the ingestion of the caffeinated drink increased mean arterial pressure (82£¿¡À£¿7£¿<£¿88£¿¡À£¿8£¿¡Ö£¿90£¿¡À£¿6£¿mmHg for 0£¿mg/kg, 1£¿mg/kg, 3£¿mg/kg of caffeine, respectively; P£¿<£¿0.05) and heart rate (57£¿¡À£¿7£¿<£¿59£¿¡À£¿8£¿<£¿62£¿¡À£¿8 beats/min, respectively; P£¿<£¿0.05) at rest in a dose response manner, though it did not affect resting metabolic rate. While the ingestion of 1£¿mg/kg of caffeine did not affect maximal power during the power-load tests with respect to the placebo, 3£¿mg/kg increased maximal power in the half-squat (2554£¿¡À£¿167£¿¡Ö£¿2549£¿¡À£¿161£¿<£¿2726£¿¡À£¿167£¿W, respectively; P£¿<£¿0.05) and bench-press actions (349£¿¡À£¿34£¿¡Ö£¿358£¿¡À£¿35£¿<£¿375£¿¡À£¿33£¿W, respectively; P£¿<£¿0.05).A caffeine dose of at least 3£¿mg/kg in the form of an energy drink is necessary to significantly improve half-squat and bench-press maximal muscle power.
%K Caffeine
%K Sports nutrition
%K Force production
%K Exercise
%K Energy expenditure
%U http://www.jissn.com/content/9/1/21/abstract