Research Study Description

A sports scientist wanted to investigate rehabilitation protocols for patellofemoral pain syndrome (runner's knee) in recreational marathon runners. 150 runners who reported persistent knee pain were invited to participate in a study investigating the effectiveness of hip-and-quadriceps strengthening interventions.

To select participants, each runner completed a Knee Injury and Osteoarthritis Outcome Score (KOOS) patellofemoral subscale, which rated their knee function and pain on a scale from 0 (extreme symptoms) to 100 (no symptoms). From this pool, 60 runners with moderate-to-severe symptoms scoring between 30 and 50 were selected to participate. They were randomly assigned to one of three groups:

• Condition 1 (Supervised PT): Attended twice-weekly, 45-minute clinical strength training sessions led by a sports physiotherapist for 10 weeks.
• Condition 2 (Home App): Followed a daily, 15-minute home-based rehabilitation exercise routine guided by a mobile application for 10 weeks.
• Condition 3 (Control): Maintained their standard running routine with no targeted rehabilitation exercises for 10 weeks.

One week after completing their respective 10-week periods, all participants completed the KOOS patellofemoral subscale again. The scores before and after the intervention were compared to evaluate improvements in knee function and pain.