Tracking Muscle Quality Following ACLR

The ACL (anterior cruciate ligament) is a ligament in the knee that helps control how the knee moves. When someone tears their ACL, the muscles around their knee get weaker because they can’t fully use and exercise the knee. ACL reconstruction surgery repairs the torn ligament, but the muscles are still weak from not being used normally. After surgery, physical therapy helps strengthen the muscles again through exercises that safely move the knee joint. This research is being done to compare methods of examining skeletal muscle quality during rehabilitation following ACL reconstruction. This study will help researchers and clinicians better understand the changes that occur in muscles following ACL reconstruction, and what methods are useful for tracking progress.

Inclusion Qualifications:

  • Ages 15-40
  • Individuals who have undergone ACL reconstruction surgery in the past two weeks.
  • Willingness to participate in physical therapy (including coverage of financial costs) and scheduled laboratory visits after reconstruction surgery.
  • Reliable transportation

Exclusion Qualifications:

You may not participate in this research opportunity if any of the following applies to you:
  • Body mass index < 20 kg/m2 or > 35 kg/m2
  • Individuals who elected to have ACL reconstruction more than 1 year after sustaining ACL injury
  • Non-English speakers
  • Bilateral ACLR
  • Current knee pain or pathology (e.g., patellofemoral pain, osteoarthritis, Osgood-Schlatter, tendon pain, bursitis, etc.) on the nonsurgical leg
  • History of intra-articular or anabolic steroid injections within the past six months
  • History of cancer
  • Current pregnancy
  • Limb amputation
  • Allergy to ultrasound gel
  • Metabolic disease (e.g., Diabetes)
  • Neuromuscular or degenerative diseases (Parkinson’s disease, ALS, Huntington’s disease, MS, etc.)
  • History of stroke
  • Use of hormone therapies within the past six months

Participate in this Research

Submitting this form will put you in contact with the main point of contact for this project. They will provide more information and determine if you meet all of the qualifications needed.

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UCF IRB#: 6096
PI: Matt S. Stock
IRB Expiration November 5, 2024
Recruitment End Date:
January 1, 2025
Time Commitment:
Number of visits: 3
Expected time per visit: 30 minutes
Type: $40 in Amazon gift cards
Point of Contact:
Matt Stock
Faculty Advisors:
Matt Stock
Associated Units:
Physical Therapy
Exercise Physiology & Rehabilitation Science
Short URL:

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