Comparing Rehabilitation Programs for Patellofemoral Pain Syndrome

This study has been completed.
Information provided by:
University of Kentucky Identifier:
First received: March 6, 2007
Last updated: August 4, 2010
Last verified: August 2010

Patellofemoral pain syndrome (PFPS) is a common knee disorder affecting physically active people. Despite the growing base of support for the early introduction of hip strengthening exercises into the rehabilitation of PFPS, there have been few randomized clinical trials comparing isolated hip to isolated quadriceps strengthening. The purpose of this study is to determine how different exercises affect pain, strength, muscle activity, and function in female subjects with patellofemoral pain. The researchers hypothesize that females diagnosed with PFPS who initially participate in a hip strengthening program will report a greater perceived level of function, greater strength, less pain, and improved neuromuscular activity than those who participate in a progressive quadriceps strengthening intervention.

Condition Intervention Phase
Patellofemoral Pain Syndrome
Procedure: Therapeutic Exercise
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Crossover Assignment
Masking: Single Blind (Subject)
Primary Purpose: Treatment
Official Title: Comparison of Early Hip Strengthening to Early Quadriceps Strengthening in the Treatment of Females With Patellofemoral Pain

Resource links provided by NLM:

Further study details as provided by University of Kentucky:

Primary Outcome Measures:
  • Visual Analog Pain Scale (Describing Worst Pain Felt During the Past Week) [ Time Frame: weekly ] [ Designated as safety issue: No ]
    0 to 10 cm line with 0 representing no pain and 10 representing severe pain

  • Subjective Function by Lower Extremity Functional Scale Report Form [ Time Frame: Baseline, Mid-Intervention, and Post-Intervention ] [ Designated as safety issue: No ]
  • Visual Analog Pain Scale [ Time Frame: 8 week ] [ Designated as safety issue: No ]
    Visual analog pain scale at end of intervention. 0 to 10 cm line with 0 representing no pain and 10 representing severe pain

Secondary Outcome Measures:
  • Strength by Isometric Dynamometer [ Time Frame: Baseline, Mid, and Post-Intervention ] [ Designated as safety issue: No ]
  • Neuromuscular Activity by Surface Electromyographical Amplitude During Stair Descent [ Time Frame: Baseline, Mid and Post-Intervention ] [ Designated as safety issue: No ]
  • Objective Function by Step-down Task for 30 Seconds [ Time Frame: Baseline, Mid, and Post-Intervention ] [ Designated as safety issue: No ]
  • Hip Abduction Strength [ Time Frame: 8 week ] [ Designated as safety issue: No ]
    Side lying Hip Abduction maximal muscular contraction with a hand held dynamometer

Enrollment: 33
Study Start Date: January 2008
Study Completion Date: January 2010
Primary Completion Date: January 2010 (Final data collection date for primary outcome measure)
Intervention Details:
    Procedure: Therapeutic Exercise
    Exercise program that is carried out by subjects under supervision once a week and then performed at home 2 additional times at home without supervision. Exercises focus on strengthening hip and quadriceps musculature.

Ages Eligible for Study:   15 Years to 35 Years
Genders Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • anterior or retropatellar knee pain reported during at least 2 of the following activities: ascending and descending stairs, hopping and running, squatting, kneeling, and prolonged sitting
  • insidious onset of symptoms not related to trauma
  • pain with compression of the patella
  • pain on palpation of the patellar facets

Exclusion Criteria:

  • symptoms present for less than one month
  • clinical evidence of other knee pathology
  • history of recent knee surgery within past one year
  • history of patellar dislocations or subluxations
  • current significant injury affecting other lower extremity joints
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00445224

United States, Kentucky
University of Kentucky
Lexington, Kentucky, United States, 40506
Sponsors and Collaborators
University of Kentucky
Study Chair: Timothy Uhl, PhD, ATC, PT University of Kentucky
  More Information

No publications provided by University of Kentucky

Additional publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Tim Uhl/Principal Investigator, University of Kentucky Identifier: NCT00445224     History of Changes
Other Study ID Numbers: 07-0138-F2L
Study First Received: March 6, 2007
Results First Received: January 28, 2010
Last Updated: August 4, 2010
Health Authority: United States: Institutional Review Board

Keywords provided by University of Kentucky:
Knee pain

Additional relevant MeSH terms:
Patellofemoral Pain Syndrome
Joint Diseases
Musculoskeletal Diseases processed this record on May 26, 2015