Journal article
Associations Among Quadriceps Strength and Rate-of-Torque Development 6 Weeks Post Anterior Cruciate Ligament Reconstruction and Future Hop and Vertical Jump Performance: A Prospective Cohort Study
The Journal of orthopaedic and sports physical therapy, Vol.47(11), pp.845-852
2017
Abstract
Study Design: Prospective cohort. Background: Quadriceps strength is associated with hop distance and jump height in persons who have undergone anterior cruciate ligament reconstruction (ACLR). However, it is unknown whether the ability to rapidly generate quadriceps torque in the early phase of recovery is associated with future hopping and jumping performance in this population. Objective: To evaluate the prospective associations among quadriceps strength and rate of torque development (RTD) and single-leg hop for distance, vertical jump height, vertical ground reaction force (vGRF), and vertical force loading rate during a landing task in persons who have undergone ACLR. Methods: Seventy patients with unilateral ACLR participated. At 6 weeks post ACLR, isometric quadriceps strength and RTD were measured using a dynamometer. At 6 months post ACLR, patients performed the single-leg hop-for-distance test. Patients also performed the single-leg vertical jump test on a forceplate which measured maximum jump height, vGRF, and average loading rate during landing. Results: Both quadriceps strength and RTD at 6 weeks post ACLR were associated with all hopping and jumping measures at 6 months post ACLR (P≤0.04). Single-leg hop distance was associated more closely with quadriceps strength than with quadriceps RTD (P=0.05) whereas vertical jump height and vGRF measures were associated more closely with quadriceps RTD than with quadriceps strength (P=0.05 and P<0.01, respectively). Both quadriceps measures were associated with loading rate. Conclusion: Quadriceps strength and RTD are complementary but distinct predictors of future hopping and jumping performance in persons who have undergone ACLR. These findings may contribute to improved rehabilitation of patients who are at risk for poor jumping/hopping performance and abnormal knee loading.
Details
- Title
- Associations Among Quadriceps Strength and Rate-of-Torque Development 6 Weeks Post Anterior Cruciate Ligament Reconstruction and Future Hop and Vertical Jump Performance: A Prospective Cohort Study
- Authors
- Yong-Hao Pua (Author) - Singapore General HospitalBenjamin Mentiplay (Author) - University of the Sunshine CoastRoss Clark (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and EngineeringJia-Ying Ho (Author) - Singapore General Hospital, Singapore
- Publication details
- The Journal of orthopaedic and sports physical therapy, Vol.47(11), pp.845-852
- Publisher
- American Physical Therapy Association
- Date published
- 2017
- DOI
- 10.2519/jospt.2017.7133
- ISSN
- 0190-6011
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Health and Behavioural Sciences - Legacy; School of Health - Public Health
- Language
- English
- Record Identifier
- 99451072002621
- Output Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Orthopedics
- Rehabilitation
- Sport Sciences