• Kenta Suzuki, Kiyokazu Akasaka, Takahiro Otsudo, Yutaka Sawada, Hiroshi Hattori, Yuki Hasebe, Yasuaki Mizoguchi, Toby M Hall, and Mitsuru Yamamoto.
• Department of Rehabilitation, Saitama Medical University Saitama Medical Center, Kawagoe.
• Medicine (Baltimore). 2021 Apr 9; 100 (14): e25423e25423.

BackgroundIn recent years, the functional movement screen (FMS) and FMS training have attracted attention as a means of preventing injury, but no studies have examined the effect of such training in high-school baseball players. The aim of this study was to clarify the effect of FMS training on FMS score, physical function and baseball performance in high-school baseball players.MethodsSubjects in this randomized controlled clinical trial were high-school male baseball players assigned to either an FMS training group (intervention group) or a control group. The intervention group performed FMS training 4 times per week for 12 weeks. FMS ability, physical function, and baseball performance were measured prior to the intervention, 8, 12, and 24 weeks after the intervention in the subjects' school environment.ResultsA total of 71 baseball players aged 15 to 17 years were recruited and assigned to either an intervention group (n = 37) or control group (n = 34). There was no significant difference in the characteristics of participants between the 2 groups. Most FMS scores improved to 12 weeks after continued training. In the intervention group compared with the control group, deep squat, hurdle step, inline lunge, active straight leg raise, trunk stability push-up and rotary stability FMS score, total FMS score and eyes closed single leg stance time significantly increased after 8 weeks of training. While hurdle step, inline lunge, active straight leg raise, trunk stability push-up, total FMS score, and eyes closed single leg stance time significantly increased, pitching ball speed significantly decreased at the end of the 12 week training period. Eyes closed single leg stance time and feeling of fatigue significantly improved 12 weeks after training. The number of subjects who scored less than 14 for the total FMS score in the intervention group compared with control group were significantly less after 8 and 12 weeks of FMS training.ConclusionFMS training for 8 weeks contributes to improving FMS scores for high-school baseball players, but FMS scores go down if FMS training is not continued.Trial RegistrationUniversity Hospital Medical Information Network Center, Tokyo, Japan: UMIN000027553. Registered on May 30, 2017.Copyright © 2021 the Author(s). Published by Wolters Kluwer Health, Inc.

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