Interindividual differences in physical function and their impact on regular player selection among junior high school soccer athletes.

[Purpose] Unlike professional teams that use comprehensive evaluations, player selection in local and school-level soccer teams relies on the coaches' practical experience. This study investigated the differences in physical function between regular and non-regular male junior high school soccer players to provide valuable insights into player selection. [Participants and Methods] We assessed grip strength, rebound jumps, muscle strength, agility, short-distance running, anaerobic power, and countermovement jumps in 55 Japanese junior high school boys, who were divided into regular (R) and non-regular (NR) groups. Moreover, the age, height, and weight of the groups were compared. [Results] The analysis revealed significant differences in countermovement jumps and anaerobic power, while accounting for age and physique. [Conclusion] These results suggest that countermovement jumps and anaerobic power may constitute determining factors for regular and non-regular players, even when age and physical characteristics are considered.