Integrated Neuromuscular Training for Repeated Jumping Performance in Collegiate Volleyball Players

This randomized controlled study evaluated whether adding integrated neuromuscular training (INT) to regular volleyball instruction could improve repeated jumping performance in collegiate volleyball players. Thirty-four participants were randomly assigned to an INT group or a control group. Both groups continued the same conventional volleyball instruction, while the INT group also received structured neuromuscular training twice per week for 9 weeks. The INT program included plyometric exercises, strength training, core stabilization, and speed-agility drills. Repeated jumping performance was assessed before the intervention, immediately after the 9-week intervention, and after a further 3-week follow-up period. Participants completed three Continuous Countermovement Semi-Squat Jump (CCSJ) protocols: five consecutive jumps, continuous jumping for 15 seconds, and continuous jumping for 30 seconds. Outcomes included jump height, peak force, mean force, and fatigue index.

Inclusion Criteria * Collegiate volleyball players * Healthy at the time of enrollment * No lower-limb injury within the preceding six months * Functional Movement Screen score greater than 16 * Provided informed consent to participate in the study Exclusion Criteria * Lower-limb injury within the preceding six months * Functional Movement Screen score 16 or lower * Acute medical history that could affect safe participation in the testing or training procedures