Amir Hossein Haghighi; Ali Zaferanieh; Seyed Alireza Hosseini Kakhk
Abstract
Background and Aim: The caffeine, as a psychoactive supplement, is widely used by the athletes, however the effectiveness of its consumption in different periods of training and sports was not understood. The purpose of present study was to determine the effect of caffeine consumption on some ...
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Background and Aim: The caffeine, as a psychoactive supplement, is widely used by the athletes, however the effectiveness of its consumption in different periods of training and sports was not understood. The purpose of present study was to determine the effect of caffeine consumption on some skill indicators and motor fitness in elite table tennis players of Sabzevar. Materials and Methods: Fourteen male elite table tennis players (mean age 29±11.6 years, height 175±7.79 cm and weight 77.07±15.26 kg) volunteered for the research. The study design was crossover, in which the subjects placed in 3 different conditions of control (Con), caffeine consumption [(C), 5 mg/kg], and placebo consumption (Starch powder as capsule), with a period of one day between the conditions. In each session, subjects performed forehand, backhand, and service techniques, and also agility and reaction time tests. The data were analyzed by the ANOVA repeated measures and Bonferoni post-hoc tests and the level of statistical significance was set at p<0.05. Results: The results showed that caffeine consumption had no significant effect on the physical fitness and skill indicators (p>0.05). Conclusion: Consumption of 5 mg/kg caffeine has no effect on improvement of skill indicators and motorfitness of elite table tennis players.
Ali Reza Nasirzade; Saeed Ilbeigi; Ali Reza Ehsanbakhsh; Marziyeh Saghebjoo
Abstract
Background and Aim: The aim of this study was to assess the muscle architectural parameters such as muscle thickness, pennation angle and fascicle length of the biceps, brachii, and triceps brachii (long head) muscles in table tennis players. Materials and Methods: 16 table tennis players and 10 inactive ...
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Background and Aim: The aim of this study was to assess the muscle architectural parameters such as muscle thickness, pennation angle and fascicle length of the biceps, brachii, and triceps brachii (long head) muscles in table tennis players. Materials and Methods: 16 table tennis players and 10 inactive individuals participated in the study, with no significant differences for their age, height, weight, and arm length parameters. Muscle thickness and pennation angle in 50%, 60% and 70% of arm length sites was measured and fascicle length was estimated by B-mode ultrasonography images. Results: The results indicated significantly greater muscle thickness for biceps brachii only in 60% and 70% sites in table tennis players. They also showed significantly greater muscle thickness, lesser pennation angle, and greater fascicle length in all sites of triceps brachii. Conclusion: It seems that muscle architectural parameters developed in table tennis players arm muscles to help them to perform their high speed movements. However, muscle thickness of biceps brachii and triceps brachii at different arm sites showed dissimilar adaptations.
