Analysis of the Trait Sportive Self-Confidence in Team Sports According to Demographic Variances

This research was conducted to determine the level of athletes' trait sportive confidence and to compare them in terms of demographic variances. In the research which is in the model descriptive survey, Trait Sportive Self Confidence Scale developed by Vealey (1986) was used as data collection tool. Based on typical sampling method of purposive sampling methods, this research sample is consisted of 279 athletes playing in Ptofessional Football League and female-male Volleyball League in Turkey in 2017-2018 season. In the evaluation of the research data, the assumptions of the tests were examined primarily; for unrelated measurements, t-test, one-way analysis of variance (One Way ANOVA) and Kruskal Wallis test. As a result of the research it was determinated that the trait sportive self-confidences of the athlethes were at a high level. When the findings of the study were evaluated in terms of demographic variables, it was determined that there was a significant difference according to the age or the status of the league played

A meta-analysis on the association of ACE and PPARA gene variants and endurance athletic status

INTRODUCTION: Genetics has an important role in determining the athletic ability and endurance performance potential. This study aimed to investigate the variable results obtained from endurance athletes and control participants in terms of angiotensin-converting enzyme (ACE) and peroxisome proliferator-activated receptor alpha (PPARA) polymorphism distributions. EVIDENCE ACQUISITION: Multiple electronic databases were investigated independently by two researchers. A meta-analysis was conducted on the association of ACE insertion/deletion (I/D) polymorphism and PPARA G/C polymorphisms with endurance athletes. Odds ratios (OR) and 95% confidence intervals (CI) were estimated. Twenty-six studies were identified for the ACE I/D for 2979 endurance athletes and 10048 control participants while seven studies were identified for PPARA G/C for 901 endurance athletes and 2292 control participants. EVIDENCE SYNTHESIS: There was a significant difference in ACE genotype distribution between endurance athletes and control (II vs. ID+DD: OR=1.48; 95% CI=0.30-2.67; P=0.001). On the other hand, there was not a significant difference in PPARA G/C polymorphism geno-type distribution between endurance athletes and control (GC+CC vs. GG: OR=0.93; 95% CI=-0.46-2.32; P=0.192; GC+GG vs CC: OR=0.62; 95% CI=-1.75-2.99; P=0.604). CONCLUSIONS: The results have shown that ACE I/D polymorphism may be associated with endurance performance in sports and that the predominance of the ACE II genotype in a person may play an advantageous role in being an endurance athlete. However, this effect has not been observed in PPARA G/C polymorphism. (Cite this article as: Ipekoglu G, Bulbul A, Cakir HI. A meta-analysis on the association of ACE and PPARA gene variants and endurance athletic status. J Sports Med Phys Fitness 2022;62:795-802. DOI: 10.23736/S0022-4707.21.12417-X