The Immediate Effects of Passive Hip Joint Mobilization on Hip Muscle Strength in Patients With Anterior Knee Pain

Inclusion Criteria: * diagnosis: anterior knee pain * Prescription for physiotherapeutic treatment of anterior knee pain * signs of functional hip impairment: * impaired hip kinematics during single leg squat * reduced passive hip joint mobility in comparison to the other, unaffected side * manually weak tested hip abductors/external rota-tors in comparison to the other, unaffected side Exclusion Criteria: * intraarticular knee pathology * preceding trauma/operation of lower extremity on affected side * spinal disorders associated with low back pain, lumbar referred pain or nerve root irritation * severe and/or recurring ankle sprains in recent history (significant enough, that it required a period of immobilization) * other relevant comorbidities such as neurologic/rheumatologic/psychiatric diseases, osteoporosis and malign disorders * pregnancy