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

This study has been completed.
Information provided by:
National Taiwan University Hospital Identifier:
First received: August 14, 2008
Last updated: NA
Last verified: June 2008
History: No changes posted
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 Intervention
Patellofemoral Pain Syndrome Other: Additional Hip Muscle Strengthening to Leg Press Exercise Other: Leg Press Exercise

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Outcomes Assessor)
Primary Purpose: Treatment

Resource links provided by NLM:

Further study details as provided by National Taiwan University Hospital:

Primary Outcome Measures:
  • 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 ]

Enrollment: 85
Study Start Date: March 2008
Primary Completion Date: July 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
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.


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
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Please refer to this study by its identifier: 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

Publications: Identifier: NCT00736736     History of Changes
Other Study ID Numbers: 200801069R
Study First Received: August 14, 2008
Last Updated: August 14, 2008

Additional relevant MeSH terms:
Patellofemoral Pain Syndrome
Pathologic Processes
Joint Diseases
Musculoskeletal Diseases processed this record on August 17, 2017