Single-leg hop distance normalized to body height is associated with the return to sports after anterior cruciate ligament reconstruction

• Published in: Journal of experimental orthopaedics 2021-04, Vol.8 (1), p.26-26, Article 26
• Main Authors: Ohji, Shunsuke, Aizawa, Junya, Hirohata, Kenji, Ohmi, Takehiro, Mitomo, Sho, Jinno, Tetsuya, Koga, Hideyuki, Yagishita, Kazuyoshi
• Format: Article
• Language: English
• Subjects: Anterior cruciate ligament; Anterior cruciate ligament reconstruction; Body height; Hopping; Joint and ligament injuries; Knee; Medicine; Medicine & Public Health; Original Paper; Orthopedics; Reconstructive surgery; Rehabilitation; Return to play; Surgical Orthopedics
• ISSN: 2197-1153; 2197-1153
• DOI: 10.1186/s40634-021-00344-z

Purpose To investigate the relationship between single-leg hop distance (SLHD), normalized body height, and return-to-sports (RTS) status after anterior cruciate ligament reconstruction (ACLR) and to identify the cut-off value for SLHD on the operated side. Methods Seventy-three patients after primary ACLR (median 13.5 months) participated in this cross-sectional study. Participants were divided into ‘‘Yes-RTS’’ (YRTS) or ‘‘No-RTS’’ (NRTS) groups based on a self-reported questionnaire. SLHD was measured, and the limb symmetry index (LSI) and SLHD (%body height) were calculated. A minimum p- value approach was used to calculate the SLHD cut-off points (%body height) on the operated side that were strongly associated with the RTS status. Logistic regression analysis was used to analyse the association between RTS status and SLHD cut-off point (%body height). Isokinetic strength and Tampa scale for kinesiophobia (TSK) were measured as covariates. Results Among 73 patients, 43 (59%) were assigned to the YRTS and 30 (41%) to the NRTS group. The 70% body height cut-off point for SLHD on the operated side was most strongly associated with RTS status. In a logistic regression analysis including other covariates, SLHD (%body height)