The tennis serve is closely related to the quality of the tennis match. However, the isokinetic parameters associated with the tennis serve are still unclear. The aim of this study was to investigate the relationships between ball velocity and isokinetic shoulder strength in tennis serve and to determine isokinetic strength parameters that can predict tennis serve velocity. A total of 13 elite male athletes (16.8 ± 1.5 years) voluntarily participated in the study. The athletes' shoulder internal-external rotation, extension-flexion and abduction-adduction strengths were measured with 5-5-15 repetitions at 60°/s, 180°/s, 240°/s angular velocities. Later, the athletes' 1st, 2nd, and average serve ball speeds were determined using a handheld radar gun. Significant correlations were found between ball speed and isokinetic tennis serve strength (r = 0.556-0.819; p < 0.05). The correlations between ball speed and isokinetic strength performance were higher at 180°/s and 240°/s angular velocities. Extension (240°/s; r = 0.819), flexion (180°/s; r = 0.755), abduction (240°/s; r = 0.733), adduction (240°/s; r = 0.684) and internal rotation (180°/s; r = 0.803) were highly correlated with ball velocity. These findings suggest that strength training to increase the ball speed of the tennis serve should be performed fast at high angular velocities and planning should focus on the strength of extension, flexion, abduction, adduction and internal rotation.

This meta-analysis aimed to investigate the association between genetic polymorphisms in Collagen type 1 alpha-1 (COL1A1), Collagen type 3 alpha-1 (COL3A1), Collagen type 5 alpha-1 (COL5A1), and Collagen type 12 alpha-1 (COL12A1) genes and anterior cruciate ligament (ACL) injuries in athletes. A systematic search was diligently conducted on the PubMed and Web of Science databases to identify relevant studies on 5–9 September 2023. Only case–control studies were included in the meta-analysis. A total of 19 studies were reviewed, involving the analysis of 3522 cases and 6399 control subjects. Data relevant to the study objectives were extracted from these chosen studies and subsequently analyzed using either a random-effects or fixed-effects model. It indicates that individuals carrying the G allele in the COL1A1 (rs1107946) gene have a decreased risk of anterior cruciate ligament injuries (OR: −0.27, 95% CI: −0.42 to −0.12, p < 0.001). A similar relationship was observed in the dominant model, but this relationship was reversed in the recessive model (OR: 0.69, 95% CI: 0.33 to 1.05, p < 0.001). However, no significant associations were found in the COL3A1 (rs1800255) and COL5A1 (rs12722) genes. In the COL12A1 (rs970547) gene, the A allele was associated with an increased risk of anterior cruciate ligament injuries (OR: 0.18, 95% CI: 0.01 to 0.36, p = 0.041). This meta-analysis suggests that genetic variants in COL1A1 (rs1107946) and COL12A1 (rs970547) may be associated with ACL injuries in athletes. However, COL3A1 rs1800255 and COL5A1 rs12722 gene variants do not appear to have a significant association with these injuries.

This meta-analysis was designed to investigate the relationship between genetic polymorphisms (AGT rs699, AMPD1 rs17602729, HIF1α rs11549465, IL-6 rs1800795) and power athletes’ status. Only case-control studies were included in the meta-analysis. A systematic search of the PubMed and Web of Science databases was performed to identify relevant studies and 23 studies met the inclusion criteria for the meta-analysis. The data from the included studies were pooled and analyzed using a random effects or fix effects model. The effect size was calculated as the odds ratio or a risk ratio with 95% confidence intervals. The results showed that certain genetic polymorphisms, AGT rs699 Thr allele, HIF1A rs11549465 Ser allele and AMPD1 rs17602729 C allele, were significantly more prevalent in power athletes (p < 0.05). When examining the genotype frequency distribution of AGT rs699 and AMPD1 rs17602729, significant differences were found in both the dominant and recessive models (p < 0.05). The results indicate that these gene polymorphisms play a role in power athlete status, however, new and more comprehensive studies are needed to confirm these results.

Purpose: Genetic factors are important in terms of athletic performance. Recent studies to determine the relationship between the genes that lead to physiological responses have attracted attention. In this respect, this meta-analysis study was designed to examine the relationship between genetic polymorphism (BDKRB2 rs5810761, GNB3 rs5443, HIF1A rs11549565, MCT1 rs1049434, NOS3 rs2070744) and endurance athlete’s status. Methods: The search included studies published from 2009 to 2022. To determine the relevant studies, Pubmed, Web of Science databases were systematically scanned. Only case-control studies were included in the meta-analysis. To determine the relevant studies, Pubmed, Web of Science databases were systematically scanned, and a total of 31 studies met the criteria for inclusion in the meta-analysis. Relevant data from the included studies were collected and analyzed using a random effects or fixed effects model. The effect size was calculated as the odds ratio or a risk ratio the corresponding 95% confidence intervals. Results: According to the results of the analysis, BDKRB2 rs5810761 + 9 allele, and NOS3 rs2070744 T allele were significantly more prevalent in endurance athletes (p < 0.05). Genotype distributions of BDKRB2 rs5810761, MCT1 rs1049434, and NOS3 rs2070744 showed significant differences in the dominant model (p < 0.05). However, no significant association was found between endurance athlete status and GNB3 rs5443 and HIF1A rs11549465 polymorphisms. Conclusion: These results show that some gene polymorphisms play an important role in endurance athlete status and suggest that having a specific genetic basis may also confer a physiological advantage for performance.

This study was conducted to investigate the genotype and allele distributions of COL3A1 (rs1800255) and COL5A1 (rs12722) polymorphisms of professional footballers who have suffered at least 2 anterior cruciate ligament (ACL) injuries non-contact and professional footballers who have never had a ligament injury. The research group consists of 108 professional men's football players ACL group (n=45), Control group (n=63) with at least 10 years of football background. The results ACL and control groups were compared by Chi-square or Fischer’s exact test. There were no significant differences noted neither in terms of genotype distribution of COL3A1 (rs1800255) nor A-allele frequency distribution between control (CON) and ACL group. A highly significant difference in the allele distribution was noted for COL5A1 (rs12722) with the T-allele significantly less frequent in CON than ACL. The TT genotype compared to the C alleles (TC + CC) showed significant relationship between the TT genotype and ACL injury potential in the dominant model. However, it was not showing significance in the recessive (TT + TC vs. CC). In conclusion, it can be said that professional football players who have the COL5A1 rs12722 C allele have about 2 times lower risk of anterior cruciate ligament injury. In the COL3A1 rs1800255 polymorphism, there is no relationship between the groups in terms of genotypes and allele distribution.

Bu çalışmanın amacı, amatör futbol oyuncularının anaerobik güç ve ivmelenme parametrelerinin bazı fiziksel özelliklere göre incelenmesidir. Bölgesel amatör ligde futbol oynayan 17 amatör futbol oyuncusu araştırmaya gönüllü olarak katıldı (n=17, yaş=24,82±4,63 yıl, vücut ağırlığı=74,26±9,07 kg., boy uzunluğu=176,51±6,35 cm., vücut kitle indeksi=23,75±1,56 kg/m2). Oyuncuların vücut kompozisyonu parametreleri (vücut ağırlığı (kg.), vücut yağ yüzdesi (%), yağsız vücut kitlesi (kg.), kas kitlesi (kg.) ve vücut kitle indeksi (kg./m2)) biyoimpedans analizi yöntemiyle belirlendi. Anaerobik güç parametrelerini (maksimum, minimum ve zirve güç (watt/kg.), zirve güce ulaşılan süre (sn.), yorgunluk indeksi (%)) belirlemek için Wingate anaerobik güç testi uygulandı. İvmelenme parametreleri (0-5, 0-10, 0-15 ve 0-20 m. ivmelenme parametreleri) 20 metre sprint testi ile ölçüldü. Vücut kompozisyonu ile anaerobik güç ve ivmelenme parametreleri arasındaki ilişkiler Pearson korelasyon katsayısı ile incelendi. Analiz sonuçlarına göre, boy uzunluğu ile 0-5 ve 0-10 m. sprint koşusunun süreleri arasında orta düzeyde pozitif, sprint hızları ve ivmelenme değerleri arasında orta düzeyde, negatif ve anlamlı ilişki olduğu belirlendi (p