Peeler, Jason and Anderson, Judith Esther
The objective of this study was to determine if a 3-week static stretching program would increase quadriceps muscle flexibility in patellofemoral joint pain syndrome (PJPS) individuals. 83 participants were sorted into normal and PJPS groups via orthopaedic assessment of knee pain and function, and their quadriceps flexibility was evaluated. All subjects completed a 3-week static quadriceps stretching program. Flexibility, knee pain, and function were then reassessed. The results showed that prestretching anthropometric and physical activity data illustrated that the groups were homogenous, with severity of knee pain, joint dysfunction, and quadriceps flexibility being the prime differences. Following the stretching program, a significant improvement in flexibility was detected for both groups, and the PJPS group reported a significant decrease in knee pain and improved joint function. However, Pearson product-moment correlation coefficients indicated that changes in quadriceps flexibility were poorly correlated with changes in knee pain and function. The authors concludet that this study confirms the effectiveness of a 3-week static stretching regimen for enhancing quadriceps flexibility and knee joint function, but fails to demonstrate a statistical relationship between quadriceps flexibility and the severity of knee pain and joint dysfunction in a PJPS population.
Clinical Journal of Sport Medicine, 2007, 17(4), 234-241