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The effect of progressive resistance exercise on knee muscle strength and function in participants with persistent hamstring deficit following ACL reconstruction : A randomized controlled trial
Bregenhof, Bo Aagaard, Per Nissen, Nis Creaby, Mark W. Thorlund, Jonas Bloch Jensen, Carsten Torfing, Trine Holsgaard-Larsen, Anders
Bregenhof, Bo
Aagaard, Per
Nissen, Nis
Creaby, Mark W.
Thorlund, Jonas Bloch
Jensen, Carsten
Torfing, Trine
Holsgaard-Larsen, Anders
Abstract
OBJECTIVE: To investigate the effect of progressive resistance exercise compared with low-intensity home-based exercises on knee-muscle strength and joint function in people with anterior cruciate ligament (ACL) reconstruction and persistent hamstring strength deficits at 12–24 months after surgery.
DESIGN: Randomized controlled superiority trial with parallel groups, balanced randomization (1:1), and blinded outcome assessment.
METHODS: People with ACL reconstruction (hamstring autograft) and persistent hamstring muscle strength asymmetry were recruited 1 to 2 years postsurgery and randomized to either 12 weeks of supervised progressive strength training (SNG), or 12 weeks of home-based, low-intensity exercises (CON). The primary outcome was between-group difference in change in maximal isometric knee flexor muscle strength at 12-week follow-up.
RESULTS: Fifty-one participants (45% women, 27 ± 6 years) were randomized to SNG (n = 25) or CON (n = 26), with 88% follow-up rate at 12 weeks. People in the SNG group improved their knee flexor muscle strength (0.18 N·m/kg, 95% confidence interval [CI]: 0.07, 0.29; P = .002) more than the CON group, from baseline to 12 weeks. The SNG group also had superior Knee Injury and Osteoarthritis Outcome Scores for Pain (4.6, 95% CI: 0.4, 8.7; P = .031) and daily living function (4.7, 95% CI: 1.2, 8.2; P = .010) compared to the CON group.
CONCLUSION: In people with persistent hamstring muscle strength deficits after ACL reconstruction, 12 weeks of supervised progressive strength training was superior to low-intensity home-based exercises for improving maximal knee flexor muscle strength and some patient-reported outcomes. J Orthop Sports Phys Ther 2023;53(1):40–48. Epub: 17 October 2022. doi:10.2519/jospt.2022.11360
Keywords
anterior cruciate, ligament reconstruction, functional outcome, hamstring, muscle strength, rehabilitation
Date
2023
Type
Journal article
Journal
Journal of Orthopaedic and Sports Physical Therapy
Book
Volume
53
Issue
1
Page Range
40-48
Article Number
ACU Department
School of Behavioural and Health Sciences
Faculty of Health Sciences
Faculty of Health Sciences
Relation URI
Source URL
Event URL
Open Access Status
License
All rights reserved
File Access
Controlled