Altered biomechanical strategies and medio-lateral control of the knee represent incomplete recovery of individuals with injury during single leg hop

Roos, Paulien E. ORCID: https://orcid.org/0000-0003-3027-3432, Button, Kate ORCID: https://orcid.org/0000-0003-1073-9901, Sparkes, Valerie ORCID: https://orcid.org/0000-0003-4500-9327 and van Deursen, Robert W.M. ORCID: https://orcid.org/0000-0002-9461-0111 2014. Altered biomechanical strategies and medio-lateral control of the knee represent incomplete recovery of individuals with injury during single leg hop. Journal of Biomechanics 47 (3) , pp. 675-680. 10.1016/j.jbiomech.2013.11.046

Full text not available from this repository.

Abstract

Anterior Cruciate Ligament (ACL) injury can result in failure to return to pre-injury activity levels and future osteoarthritis predisposition. Single leg hop is used in late rehabilitation to evaluate recovery and inform treatment but biomechanical understanding of this activity is insufficient. This study investigated single leg hop for distance aiming to evaluate if ACL patients had recovered: 1) landing strategies and 2) medio-lateral knee control. We hypothesized that patients with reconstructive surgery (ACLR) would have more similar landing strategies and knee control to healthy controls than patients treated conservatively (ACLD). 16 ACLD and 23 ACLR subjects were compared to 20 healthy controls (CONT). Kinematic and ground reaction force data were collected while subjects hopped their maximum distance. The main output parameters were hop distance, peak knee flexor angles and extensor moments and Fluency (a measure introduced to represent medio-lateral knee control). Statistical differences between ACL and control groups were analyzed using a general linear model univariate analysis, with COM velocity prior to landing as covariate. Hop distanced was smallest for ACLD and largest for CONT (p<0.001; ACLD 57.1±14.1; ACLR 75.1±17.8; CONT 77.7±14.07%height). ACLR used a similar kinematic strategy to CONT, but had a reduced peak knee extensor moment (P<0.001; ACLD 0.32±0.14; ACLR 0.31±0.16; CONT 0.42±0.13 BW.height). Fluency was reduced in both ACLD and ACLR (p=0.006; ACLD 0.13±0.34; ACLR 0.14±0.34; CONT 0.17±0.41 seconds). Clinical practice uses hopping distance to evaluate ACL patients’ recovery. This study demonstrated that aspects such as movement strategies and knee control need to be evaluated.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Healthcare Sciences
Subjects:	R Medicine > R Medicine (General) T Technology > TJ Mechanical engineering and machinery
Uncontrolled Keywords:	Anterior Cruciate Ligament; Biomechanics; Rehabilitation; Knee; Single leg hop
Additional Information:	Available online: 1 Dec 2013
Publisher:	Elsevier
ISSN:	0021-9290
Funders:	Arthritis Research UK
Date of Acceptance:	24 November 2013
Last Modified:	11 Sep 2023 06:22
URI:	https://orca.cardiff.ac.uk/id/eprint/53488

Citation Data

Cited 31 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item