Study on How Shoulder Manipulation Affects Muscle Strength, Stiffness, and Movement in Male Volleyball Players Aged 18 to 30

What this Trial Is About

Researchers are evaluating the impact of shoulder manipulation on muscle strength, stiffness, and motor function in volleyball players. The study aims to understand how manual therapy affects kinetic and kinematic factors of the upper limbs, which may help reduce injuries by improving strength and balance during training. This interventional trial includes healthy volleyball athletes aged 18 to 30 who regularly compete in the AZS volleyball league. Participants will be randomly assigned to one of three groups one receiving manual therapy involving a low-amplitude, high-velocity push on the shoulder joints with two seconds of tension a placebo group receiving a similar technique without therapeutic intent and an exercise group performing push-ups. The study uses a triple-blind design to evaluate effects before and after interventions and training sessions. During the study, muscle strength will be assessed through isometric tests conducted three times before intervention, immediately after, and post-training. Muscle stiffness and proprioception will also be measured at these points. Functional tests including the Y balance test, Med Ball Throw, and Close Kinetic Chain Upper Extremity Stability Test will be performed. Participants adherence to study regulations and safety measures like helmet use will be monitored. The study will last until September 2025, with assessments focused on changes in muscle function and stability.

Shoulder Manipulation in Volleyball Players