درخت حوزه‌های تخصصی

Background: Fatigue as one of the physiological factors can affect the physical performance of athletes. This issue is more important in young athletes and can expose them to injury. Aim: The purpose of this research was to investigate the effect of functional fatigue on the performance and landing mechanics of adolescence taekwondo athletes. Materials and Methods: This was a semi-experimental study. Participants were 20 male teenage taekwondo players. Pre-fatigue measurements included side-jump tests, figure-8 hop tests, and single-leg triple jump tests, as well as a lower limb biomechanics assessment using a landing error scoring system. After the functional fatigue protocol was applied, all the pre-fatigue variables were evaluated again. In order to examine the intra-group changes of the research variables in the pre and post-test stages, the paired t-test at a significance level of P≤0.05 was used. Results: The paired-t test results revealed that following fatigue induction, performance in the side-jump and figure-8 hop tests significantly deteriorated (P<0.05). Additionally, performance in the single-leg triple hop test declined (P<0.05). Moreover, landing error significantly increased (P<0.05). Conclusion: The finding of this study indicated that after applying fatigue, the subjects' performance decreased and the biomechanical error of the lower limbs increased. Fatigue can significantly impact adolescent taekwondo athletes' performance and biomechanics. So, taekwondo coaches should implement effective strategies to mitigate fatigue, enhance athletes' conditioning, and optimize their performance in training and competitions.

As people get older some may experience reduced mobility and more physical challenges that can affect their quality of life negatively. The research focused on investigating how two different types of training programs sensori-motor and Otago affect the abilities, functional balance and overall well being of men.This study was semi-experimental. This research included 45 men aged 65 to 70 who were selected in an accessible and purposeful and then randomly divided into three groups.. With 15 individuals, in each group, for sensorimotor training group the Otago training group and a control group. Respective exercise groups underwent a total of 24 training sessions done in 8 weeks. To measure abilities and being impact effectively, in this study various assessment methods were used such as Short Physical Performance Battery (SPBB) tests together with time up and go (TUG) evaluations besides implementing SF36 quality of life survey questionnaire. ANOVA and paired sample t-tests were done for data analysis with a significance level set at p≤ 0.05 using SPSS software version 23. The outcomes showed a Significant different, in groups prior and post exercise experimental (p=0.001). Significant variations were noted in the test results when comparing the sensorimotor and Otago groups to the control group at a significance level of p=0.001 for inter group comparisons; whereas no notable variations were observed among the groups during the pre test phase.Both sensorimotor and Otago exercises effectively enhance physical performance, functional balance, and quality of life in elderly men. Since no significant difference was found between the two experimental groups, it can be concluded that either type of exercise can be beneficial for improving these aspects of

Purpose: The purpose of this review study is to investigate dental caries and intense training. the oral health of athletes in various sports is inappropriate, so that athletes follow a downward trend with an increase in the incidence of various diseases of the oral cavity, performance during training and racing. Method: intense training has been identified as a harmful factor in the occurrence of a variety of oral diseases, including dental caries. Results: In this context, intense training plays a role as a negative factor in the development of dental caries in athletes by affecting various factors such as saliva PH and blood co2 in dental caries. Conclusion: In this regard, athletes need to be monitored by dentists, which seems to be effective in preventing the decline of athletes ' performance.