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1- MSc, Sports Sciences Department, Faculty of Literature and Human Sciences, Lorestan University, Khorramabad, Iran
2- Associate Professor, Sports Sciences Department, Faculty of Literature and Human Sciences, Lorestan University, Khorramabad, Iran ,Valipour.v@lu.ac.ir
3- Assistant Professor, College of Physical Education and Sport Science, Diyala University, Iraq
2- Associate Professor, Sports Sciences Department, Faculty of Literature and Human Sciences, Lorestan University, Khorramabad, Iran ,
3- Assistant Professor, College of Physical Education and Sport Science, Diyala University, Iraq
Abstract: (15 Views)
Background: Physical activities, especially sports, improve serum levels of some factors related to cognitive function. In addition, L-arginine increases blood circulation. As a result, these two factors may have a synergistic effect on increasing serum levels of these factors. Therefore, the present study aimed to investigate the effects of two weeks of L-arginine supplementation on serum irisin and brain-derived neurotrophic factor (BDNF) levels in adolescent volleyball players.
Materials and Methods: In this semi-experimental study, 19 adolescent male volleyball players (age: 15.74±1.56 years, body mass: 73.05±12.86 kg, height: 183.42±10.99 cm) were selected and randomly assigned to either the placebo (n=9) or the experimental (n=10) group. First, the participants signed a written consent form, and then they completed the training protocol for two weeks, with three sessions per week. The participants in the placebo group consumed 0.1 g/kg of body weight of starch and the experimental group consumed 0.1 g/kg of L-arginine daily. Before and after the training protocol, blood samples were taken from the participants to measure serum irisin and BDNF levels. The data were analyzed using paired samples t-tests and analysis of covariance.
Results: The results showed that two weeks of volleyball training with and without L-arginine significantly increased serum irisin and BDNF levels compared to the pre-test (p=0.001, for all). However, L-arginine consumption further increased serum irisin (p=0.004) and BDNF (p=0.043) levels.
Conclusion: Volleyball practice for two weeks increased serum levels of irisin and BDNF, and L-arginine consumption significantly enhanced this increasing effect. Therefore, L-arginine consumption is suggested to improve brain function through irisin and BDNF mediators in adolescent volleyball players.
Materials and Methods: In this semi-experimental study, 19 adolescent male volleyball players (age: 15.74±1.56 years, body mass: 73.05±12.86 kg, height: 183.42±10.99 cm) were selected and randomly assigned to either the placebo (n=9) or the experimental (n=10) group. First, the participants signed a written consent form, and then they completed the training protocol for two weeks, with three sessions per week. The participants in the placebo group consumed 0.1 g/kg of body weight of starch and the experimental group consumed 0.1 g/kg of L-arginine daily. Before and after the training protocol, blood samples were taken from the participants to measure serum irisin and BDNF levels. The data were analyzed using paired samples t-tests and analysis of covariance.
Results: The results showed that two weeks of volleyball training with and without L-arginine significantly increased serum irisin and BDNF levels compared to the pre-test (p=0.001, for all). However, L-arginine consumption further increased serum irisin (p=0.004) and BDNF (p=0.043) levels.
Conclusion: Volleyball practice for two weeks increased serum levels of irisin and BDNF, and L-arginine consumption significantly enhanced this increasing effect. Therefore, L-arginine consumption is suggested to improve brain function through irisin and BDNF mediators in adolescent volleyball players.
Type of Study: Applicable |
Subject:
Physiology
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Complementary Medicine Journal
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