Comparative Effects of Static Stretching and PNF Techniques on Functional Flexibility and Postural Balance in Competitive Taekwondo Athletes

Abstract

Objective Flexibility and functional balance are critical for optimal performance in Taekwondo, as they directly impact an athlete's ability to execute precise techniques and minimize the risk of injury. This study aimed to evaluate the effects of static stretching and proprioceptive neuromuscular facilitation (PNF) on flexibility and functional balance in Taekwondo practitioners. Methods Thirty-seven Taekwondo athletes (mean age: 19.43 ± 1.46 years; training experience: 4.05 ± 1.05 years) who met the inclusion criteria participated in this study. Participants were purposefully selected based on age, sex, and body mass index (BMI), and were randomly assigned to one of three groups: static stretching, PNF stretching, or control (no stretching). The PNF protocol employed the contract-relax-agonist-contract method, while the static stretching group performed 30-second holds over an eight-week period. Flexibility (measured via 180-degree split), single-leg stance time (SLST), and hop test (HT) performance were assessed before and after the intervention. Data were analyzed using ANCOVA with Bonferroni post-hoc tests, with significance set at p ≤ 0.05. Results Athletes in the PNF group showed significant improvements in 180-degree split flexibility (p < 0.001), SLST (p < 0.001), and HT performance (p < 0.05) compared to the control group. Conclusion PNF stretching appears to significantly enhance flexibility and functional balance in Taekwondo athletes. This technique may improve joint range of motion, reduce muscle stiffness, and enhance the execution of complex movements and quick directional changes essential in Taekwondo performance.