عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Background and Aim: The purpose of this study was to investigate the effect of caffeine on muscle strength and endurance in amateur soccer players. Materials and Methods: The research method was quasi-experimental and population research was selected of soccer players leagues of Saveh in 2012. Forty eight athletes were selected (mean BMI= 23.8 ± 0.36 kg/m2, weight= 76.1 ± 1.22 kg, height= 178.5 ± 0.89 cm and age= 24.8 ± 0.49 yr.) and randomly divided into two experimental and control groups. After measuring body mass index, the muscle strength and endurance also were evaluated with one-repetition maximum (1RM) test in leg press and 80% 1RM repetitions, respectively. 72 hours later, the experimental and control groups consumed caffeine (5 mg/kg) and placebo (Flour) respectively. The same measurements of pre-test session were repeated one hour after supplement consuming. Independent t-test was used to compare the differences between groups and significance level was set as p˂0.05. Results: The results showed that there was significant increase in strength (p<0.0001) and endurance (p<0.04) in the caffeine group; but there were no any significant changes in placebo individuals (p˃0.05). Conclusion: Findings show that consumption of 5 mg/kg caffeine significantly improved muscular strength and endurance in the amateur soccer players.
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