en حرکت‌شناسی و آسيب‌های ورزشی Kinesiology and Sport Injuries مقاله اصیل Original Article <div style="text-align: justify;"><strong>Background. </strong>The ACTN3 R allele is associated with normal ACTN3 expression in fast-twitch muscle.<br> <strong>Objectives. </strong>This study investigates whether the ACTN3 R allele, which is associated with normal ACTN3 expression in fast-twitch muscle fibers, is linked to performance and injury susceptibility in well-trained male badminton players.<br> <strong>Methods.</strong> A total of 101 well-trained male badminton players (mean age: 20.72 &plusmn; 6.72 years) were genotyped for this polymorphism using DNA extracted from buccal cells. Training history, injury incidence, and severity over the past year were recorded. Strength and power were assessed via handgrip, back strength, vertical leap, standing long jump, and a 40-meter sprint.<br> <strong>Results. </strong>Positive correlations were observed between the RR genotype and both back strength (r = 0.283, p = 0.004) and handgrip strength (r = 0.320, p = 0.001). Multinomial logistic regression indicated that the RR genotype was associated with a higher likelihood of minor injuries (OR = 0.351) and superior back and handgrip strength (OR = 1.036, 1.202). ANOVA results further confirmed that RR and RX genotypes exhibited greater back and handgrip strength.<br> <strong>Conclusion.</strong> ACTN3 R/X polymorphism may influence physical performance attributes relevant to badminton, particularly strength and injury susceptibility.</div> Badminton Performance, ACTN3 R/X Polymorphism, Genetic Prediction, Athlete Performance 0 0 http://aassjournal.com/browse.php?a_code=A-11-2503-2&slc_lang=en&sid=1 Muhammad Iqbal Shaharudin iqbal90shahar@yahoo.com 100319475328460017566 100319475328460017566 No Department of Community Health, Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200 Kepala Batas, Pulau Pinang, Malaysia Ahmad Munir Che Muhamed ahmadmunir@usm.my 100319475328460017567 100319475328460017567 No Department of Community Health, Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200 Kepala Batas, Pulau Pinang, Malaysia Ernest Mangantig e.mangantig@usm.my 100319475328460017568 100319475328460017568 No Department of Community Health, Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200 Kepala Batas, Pulau Pinang, Malaysia Hazwani Ahmad Yusof hazwanihanafi@usm.my 100319475328460017569 100319475328460017569 Yes Department of Community Health, Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200 Kepala Batas, Pulau Pinang, Malaysia