Enhancing Overhead Throwing Ball Velocity After Core Muscle Training in Athletes A Systematic Review and Meta-analysis of Randomized Controlled Trials

Objective This systematic review and meta-analysis aimed to evaluate the influence of core muscle training on throwing ball velocity among overhead throwing athletes. Design A literature search was performed from inception to July 2023 for randomized controlled trials investigating the effects of core muscle training on overhead throwing ball velocity. The primary outcome was the change in standing throwing ball velocity. The secondary outcome focused on the enhancement of step/jump throwing ball velocity. Results Ten randomized controlled trials were included, revealing a significant improvement in standing throwing ball velocity in the group undergoing core muscle training (Hedges' g = 0.701, 95% confidence interval = 0.339 to 1.063, P < 0.001). Longer treatment duration and a higher frequency of core muscle training sessions per week contributed to improved standing throwing ball velocity. However, core muscle training did not show significant benefits for step (Hedge's g = 0.463, 95% confidence interval = -0.058 to 0.985, P = 0.082) and jump throwing ball velocity (Hedges' g = 0.550, 95% confidence interval = -0.051 to 1.152, P = 0.073). Conclusions Core muscle training significantly enhanced standing ball throwing velocity. However, its effect on step/jump throwing ball velocity was less certain. Further research is needed to explore the impact of core muscle training (especially its long-term effects) on throwing ball velocity.