Optimizing Plyometric Training for Functional Recovery Post-ACL Reconstruction
Overview
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- University of Montana
- Enrollment
- 47
- Locations
- 1
- Primary Endpoint
- Change in motor patterning via electromyography of quadriceps and hamstring muscles
Overview
Brief Summary
While surgical anterior cruciate ligament reconstruction (ACLR) of the knee restores passive stability, studies are showing consistently poor long-term outcomes. Unusually high risks of early-onset osteoarthritis and re-injury, and low rate of return to sport following ACLR all seem to be related to a chronic tendency to land stiff-legged from a jump or hop, which itself may be due to fear of re-injury. Decreased knee bending for force absorption simultaneously decreases performance level and increases risk for injury and arthritic changes.
The purpose of the proposed study is to compare a current best-practice plyometric training program to one utilizing body weight support to increase repetition and improve performance in the initial phases. The investigators hypothesize that we will see larger improvements in absorptive capacity of the knee and better confidence in activity immediately following body weight support training, as well as improved retention of training effects after a two-month period.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- Double (Participant, Outcomes Assessor)
Eligibility Criteria
- Ages
- 12 Years to 35 Years (Child, Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •speak and understand English
- •age between 12-35 years
- •unilateral anterior cruciate ligament reconstruction between 6-48 months prior
- •activity level greater than or equal to level 5 on the Tegner Activity Scale
Exclusion Criteria
- •Weight in excess of 300 pounds (136 kg)
- •contralateral/bilateral ACL reconstruction or an unreconstructed ACL injury
- •history of a posterior cruciate ligament injury
- •lower extremity of back injury or other condition (e.g. cerebral palsy) that has limited their normal activities of daily living within the last 6 months
Outcomes
Primary Outcomes
Change in motor patterning via electromyography of quadriceps and hamstring muscles
Time Frame: Baseline and after 8 weeks of training
Change in sagittal plane knee kinetics and kinematics
Time Frame: Baseline and after 8 weeks of training
Change in psychological readiness for sports activities via survey scores
Time Frame: baseline and after 8 weeks of training
Secondary Outcomes
- Retention of Biomechanical Adaptions in Knee kinetics and kinematics(Change from end of 8 weeks of training to 2 month follow-up)
- Retention of adaptations in motor patterning via electromyography(Change from end of 8 weeks of training to 2 month follow-up)
- Retention of adaptations in Psychological Readiness for Sport via survey(Change from end of 8 weeks of training to 2 month follow-up)
Investigators
Ryan Mizner
Associate Professor
University of Montana