A research for standardization of a new jumping ability index as a criterion for return to competition in athletes following ACL reconstruction surgery.

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K19409
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 59010:Rehabilitation science-related
• Research Institution: Tokyo Medical and Dental University
• Principal Investigator: Hirohata Kenji 東京医科歯科大学, 東京医科歯科大学病院, 理学療法士 (90747700)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 膝前十字靭帯損傷 / スポーツ / 復帰基準 / 片脚跳躍 / Reactive Strength Index

Outline of Final Research Achievements

This study investigated the relationship between RSI during single-leg vertical continuous jumps and isokinetic knee extensor strength in post-ACL reconstruction athletes. The study also aimed to provide new insights into the relationship between RSI during vertical continuous jumps and knee stress during exercise to standardize the evaluation of jumping ability to reduce the risk of ACL reconstructive ligament injury.
The results showed a strong association between RSI during single-leg vertical continuous jumps and isokinetic knee extensor strength in post-ACL reconstruction athletes. However, we could not yet conclude whether high or low RSI during a one-leg vertical continuous jump can be related to knee eversion stress during exercise, and this point requires further investigation.

Free Research Field

スポーツ医学

Academic Significance and Societal Importance of the Research Achievements

ACL再建術後選手の片脚垂直連続ジャンプ中RSIに着目し、その非対称性と等速性膝伸展筋力の関連を明らかにした報告はないのが現状であり、本研究成果はあらたな知見といえる。スポーツ現場での実行可能性が高い片脚垂直連続ジャンプで等速性膝伸展筋力の回復状況を推定することができれば、今後のACL再建術後選手の診療に役立つ。また運動中の膝外反ストレスとの関連も明らかにすることができれば、再損傷スクリーニング評価の一つになり得る。