The effect training and vitamin D supplementation on hormonal and functional changes of elite futsal layer's

Introduction and purpose: Vitamin D deficiency is associated with an increase in plasma parathyroid hormone levels, which leads to an increase in negative and destructive effects on the organism and a decrease in muscle function. The present study was conducted with the aim of the effect of vitamin D supplementation on the hormonal and functional changes of elite deaf national team female futsal players. Materials and methods: For this purpose,16 female football players deaf national team (age 26.20±3 years,height 155.15±3 cm, weight 56.68±2 kg and BMI 23.61±1 kg/m2)were selected and were randomly divided into two groups supplementation (n=8) and placebo (n=8). Subjects took vitamin D and placebo 120 minutes before the activity in a double-blind manner. Subjects were tested for maximal leg strength, anaerobic and aerobic capacity, speed, agility and 5cc of fasting blood from the anticubital vein before and after the tests. The training program included of continuous, plyometric, resistance and specific training. Statistical analysis was done by one-way analysis of covariance (P≤0.05). Results: According to the results of ANCOVA, there was a significant difference between the mean residual scores of vitamin D, leg strength and ergojump in groups (P≤0.05). There was no significant difference between the mean scores of aerobic power, speed, parathyroid, Calcium (P≥0.05). Findings indicate an increase in serum vitamin D (19.58 ng/ml) in supplementation group than control (P≤0.05). Discussion and Conclusion: The most favorable result of the current research is that the optimal level of vitamin D is vital for the optimal functioning of skeletal muscle. Therefore, maintaining (OH)D-25 levels can accelerate recovery for muscle power generation during intense exercise. Athletes should be evaluated throughout the year and supplemental assistance should be provided in case of problems.