Effect of 8-Weeks PNF Stretching on Muscle Strength and Neuromuscular Activity of the Hamstring Muscles in Team Sports Players

Background: Hamstring injuries are common in sports that involve rapid, forceful lengthening of the hamstring muscles, such as sprinting, jumping, and kicking. This type injury is more likely to occur team football handball. Objectives: The purpose this study was investigate chronic effects proprioceptive neuromuscular facilitation (PNF) stretching on muscle strength activity muscle. Methods: Six male players (age: 24.38 ± 1.94 years; height: 180.73 6.05 cm; body-mass: 80.23 10.42 kg) were recruited for study. Participants completed a 2-month rehabilitation program included three sessions per week contract-relax (CR) PNF stretching. Neuromuscular evaluated by electromyography (EMG) force sensor before after 8 weeks CR-PNF Results: For medial lateral there significant difference between pre- post-training apex area (P < 0.01). Similarly, great (medial lateral) contract relax positions 0.001). Conclusions: Contract-relax-proprioceptive an eight period effective increasing muscles.