درخت حوزه‌های تخصصی

Purpose: Haematological, hormonal, biochemical and physical performance parameters were altered after long-term soccer training in professional soccer players. These alterations can be influenced by different contextual factors such as playing surface, training load, duration of training and competition. The purpose of this study was to investigate the changes in the haematological, inflammatory, antioxidant and physical performance of beach soccer players during the competitive season of the beach soccer. Method: The study examined 15 elite beach soccer players in Iranian beach soccer primer league (age 24.64 ± 4.01 y, weight 75.08 ± 8.15 kg, height 181.00 ± 5.17 cm, body mass index 22.76 ± 2.36) from the pre-season, mid-season and end-season. Measurements of haematological, inflammatory, antioxidants indices and aerobic / anaerobic power were repeated in the pre-season, mid-season and end-season. Repeated-measures analysis of variance was used to examine indicators change during league season. Results: Significant decrease in SOD (p = 0.001), TAC (p = 0.043) and anaerobic power (p ≤ 0.048) and significant increase in GPx (p = 0.001), ALT (p = 0.022) was observed from pre-season to the end of the season. LDH levels showed a significant increase in the mid-season compared to the pre-season (p = 0.042) and a significant decrease at the end of the season compared to the mid-season(p = 0.014). However, no significant changes were observed in other indices during the competition season(p ≥ 0.05). Conclusions: It is suggested that some physical and physiological fatigue markers ar increase during mid-season. Therefore, beach soccer players may be  monitored  continuously during the competition season in order to be able to provide the best training, nutrition and recovery systems for performance optimization. Coaches may use the interplay between biomarker alterations and physical performance changes to better manage workload and monitor fatigue during beach soccer training and competition.

Purpose: Osteoporosis usually starts at a young age and progresses slowly over time. Therefore timely diagnosis of this disease plays an effective role in raising the level of health and public health in the society. The aim of this study was to investigate the relationship between some indicators of osteoporosis and bone mineral density of the pelvis in active elderly men. Methods: This study was semi-experimental. 25 active elderly men with the age range of 60 to 85 years were selected as available and with medical records. Anthropometric characteristics and serum indices of subjects were used as effective indices of osteoporosis. Pearson's correlation coefficient was used to find the relationship between bone mineral density of the pelvis and effector indices, data analysis was done using SPSS version 26 software. Results: The results of this research showed that in the active elderly men, there is a significant relationship between age (P=0.044), body mass index (BMI) (P=0.021), serum calcium (P=0.037) and phosphorus levels (P=0.046) and alkaline phosphatase (P=0.016), with bone mineral density (BMD) of the pelvis. No significant relationship was found between vitamin D with BMD of the pelvis (P=0.055). Conclusion: In general, the results show that there is a significant relationship between bone density and body mass index, calcium and serum alkaline phosphatase indices in active elderly men. Therefore, it is possible to use the serum levels of these indicators in predicting this disease, and exercise may also be one of the influencing factors, so the effect of exercise on other bone density indicators can be investigated.