ผลของการยืดเหยียดกล้ามเนื้อแบบกระตุกและแบบกระตุ้นระบบประสาทต่อความสามารถในการกระโดดและความอ่อนตัวของกล้ามเนื้อต้นขาด้านหลังของนักกีฬาที่มีภาวะกล้ามเนื้อต้นขาด้านหลังหดสั้น / ศิริขวัญ เฮงธารากูล = Effect of ballistic and proprioceptive neuromuscular facilitation stretching on vertical jump performance and hamstring flexibility in athlete with hamstring tightness / Sirikwan Heangthalakul
Introduction: Hamstrings tightness is a common problem in athletes and may cause deterioration of sport performance. Appropriate rehabilitation technique to stretch hamstring may improve flexibility and performance. Purpose: The objective of this study is to compare effects of static stretching, ballistic stretching and proprioceptive neuromuscular facilitation stretching on vertical jump height and hamstring flexibility in athlete with hamstring tightness after 4 weeks training peroid. Methods: Forty-eight healthy Thai male athletes with hamstrings tightness aged between 18-30 years old were recruited and randomized into 3 groups; proprioceptive neuromuscular facilitation stretching group (PNF), ballistic stretching group (BS) and control group (static stretching,SS). Subjects participated in 3 time a week, 4-week hamstrings flexibility training program according to group. Vertical jump height by Vertec system and force plate, range of motion, concentric and eccentric peak torque(PT) of hamstrings and quadriceps were recorded before and after training. Results: Forty-eight volunteers (16 of PNF,16 BS and 16 SS) completed the study. Vertical jump height, range of motion, concentric and eccentric peak torque(PT) of hamstrings and quadriceps were significantly increase in three groups after training (p<0.05). Acute vertical jump in PNF group measured by Vertec system was increased but not statistically significant. There were no between groups difference in all measured outcome (ANCOVA, p>0.05). Conclusions: The 4-weeks rehabilitation program of static, ballistic and proprioceptive neuromuscular facilitation stretching could improve performance in athletes with hamstring tightness. PNF stretching is not recommend for acute performance right after stretching.