The Effect of Percussion Massage Therapy on the Recovery of DOMS in Physically Active Young Men Delayed Onset Muscle Soreness = DOMS

The goal of this clinical trial is to learn the effect of percussion massage therapy (PMT) on the recovery of delayed onset muscle soreness (DOMS) in physically active young men. The main question it aims to answer is: Compared with static stretching, Do 25 minutes and 40 minutes of PMT can decrease pain and increase the rang of motion of knee of low limb DOMS in physically active young men? Compared with static stretching, Do 25 minutes and 40 minutes of PMT sessions can increase power and improve the neuromuscular electrophysiology of low limb DOMS in physically active young men? Researchers will compare 25 minutes and 40 minutes of PMT to a static stretching to see if different times of PMT are better to treat DOMS. Participants will： Undergo squats to induce low limb DOMS. Receive static stretching, 25 minutes and 40 minutes of PMT, respectively for three times. Visit the lab for four times in one week for tests.