عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Caffeine is one of the most widely used material in the world is, although little nutritional value but as an ergogenic allowed to have attracted the attention of many competitive athletes. The purpose of this study was to investigate the effect of caffeine consumption on muscle strength and endurance in elite middle distance runners. For sampling due to the small population of targeted and available methods were used, the total population of the 14 runners with an average age of 23.32 ± 0.04 years, height of 178.17 ± 1/12 cm, weight of 65.62 ± 1.11 kg and VO2 max 62.32 ± 2.44 ml/kg/min Which has a history of winning competitions in provincial and national championships were attending. To participate in the research and double blind study and randomly divided to two groups: Supplement and placebo. The Supplement group, received 6 mg/kg caffeine and placebo (rice flour). In tests session, the muscle strength and endurance were evaluated with one-repetition maximum and 70% 1RM repetitions tests in Leg press and bench press respectively. Independent t-test was used Showed that the average strength and muscular endurance in the Supplement group was significantly increased compared to placebo. Statistical analysis showed that there was significant increase in strength and endurance in the caffeine group; (P˂0.05). While there were no significant changes in placebo group. Based on these findings, it can be concluded that consumption of 6 mg/kg caffeine significantly improved muscular strength and endurance in the elite middle distance runners.