Introduction: Delayed onset muscle soreness (DOMS), which may occur after eccentric exercise, may cause some reduction in sport activities. For this reason, several studies have been designed on preventing and controlling DOMS. As vibration training (VT) may improve muscle performance, we designed this study to investigate the effect of VT on controlling and preventing DOMS after eccentric exercise.
Methods: Fifty healthy non-athletic volunteers were assigned randomly in two experimental, VT (n=25) and Non-VT (n=25) groups. A vibrator was used to apply one minute 50 Hz vibration on the left and right quadriceps, hamstring and cuff muscles in VT group, while no vibration was applied in the Non-VT group. Then, both groups walked downhill on a 10 degree declined treadmill at a speed of 4 km/hour. The measurements included; the isometric maximum voluntary contraction force (IMVC) of left and right quadriceps muscles, pressure pain threshold (PPT) on the 5, 10 and 15 cm above of patella and mid-line of cuff muscles of both lower limbs before and the day after treadmill walking. After 24 hours, the serum levels of creatine- kinase (CK), and DOMS level by visual analogue scale were measured.
Results: The results showed decreased IMVC force (P=0.006), reduced PPT (P=0.0001) and significantly increased mean of DOMS and CK levels in Non-VT group, compared to the VT group (P=0.001).
Conclusion: Comparison b experimental groups indicates that VT before eccentric exercise may prevent and control the DOMS. More studies should be done to find the stability and effectiveness of VT in athletics
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