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Effects of Hip Abductor and External Rotator Strength Training in Patients With Patellofemoral Pain Syndrome

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ClinicalTrials.gov Identifier: NCT00736736
Recruitment Status : Completed
First Posted : August 18, 2008
Last Update Posted : August 18, 2008
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Study Description
Brief Summary:
The first purpose was to compare the difference between leg press exercise(LPE) and additional hip abductor and external rotator muscle strength training to leg press exercise(LPE+HAE) in muscle strength, hip kinematics during step down, pain severity and function for patients diagnosed with patellofemoral pain syndrome. The second one was to discover the relationship between the change in muscle strength performance and the difference of hip joint kinematics post treatment.

Condition or disease Intervention/treatment
Patellofemoral Pain Syndrome Other: Additional Hip Muscle Strengthening to Leg Press Exercise Other: Leg Press Exercise

Study Design

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 85 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Outcomes Assessor)
Primary Purpose: Treatment
Study Start Date : March 2008
Primary Completion Date : July 2008

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U.S. FDA Resources

Arms and Interventions

Arm Intervention/treatment
Active Comparator: Leg Press
Leg Press exercise for 3 times/week and sustain for 8 weeks.
Other: Leg Press Exercise
Experimental: Hip Exercise
Additional hip abductor and hip external rotator strength training to leg press exercise for people in this group. All participants received exercise for 3 times per week for 8 weeks.
Other: Additional Hip Muscle Strengthening to Leg Press Exercise
No Intervention: Control
Education was given during 8 weeks of study period. After 8 weeks of study, exercise was given as compensation.

Outcome Measures

Primary Outcome Measures :
  1. Muscle Strength by hand-held dynamometry, hip joint kinematics during step down by electromagnetic motion tracking system (FASTRAK, Polhemus ), pain severity by PFPS pain severity scale (PSS), functional performance by Anterior Knee Pain Scale(AKP). [ Time Frame: Pre and Post 8 weeks of exercise ]

Eligibility Criteria

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Ages Eligible for Study:   19 Years to 50 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patellofemoral pain syndrome ( Bilateral or unilateral)
  • Special tests: crepitus during compression test, patellar grind test (Clarke's sign), pain during compression test, palpation ( at least 2 )
  • Below 50 years old
  • Pain :after long sitting, up/down stair, squat, kneeling, running & jumping ( at least 2 )
  • Pain duration at least 1 month
  • At least 1 item of PSS score more than 3 cm

Exclusion Criteria:

  • Knee operation
  • Central or peripheral neurological deficits
  • Obvious knee joint or lower extremity malalignment
  • People involved in competitive sports
  • PSS sub-scale pain experienced last week more than 8cm
  • Have been taking anti-inflammatory drugs , received anti-inflammatory injection or received other therapy for past 3 months
Contacts and Locations

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00736736

The School and Graduate Institute of Physical Therapy of National Taiwan University
Taipei, Taiwan, 100
Sponsors and Collaborators
National Taiwan University Hospital
Study Chair: Mei-Hwa Jan The School and Graduate Institute of Physical Therapy of National Taiwan University
More Information

ClinicalTrials.gov Identifier: NCT00736736     History of Changes
Other Study ID Numbers: 200801069R
First Posted: August 18, 2008    Key Record Dates
Last Update Posted: August 18, 2008
Last Verified: June 2008

Additional relevant MeSH terms:
Patellofemoral Pain Syndrome
Pathologic Processes
Joint Diseases
Musculoskeletal Diseases