BACKGROUND Patellofemoral pain syndrome is a descriptive term applied to patients with nonspecific anterior knee pain, and is the most common knee problem. The pain in most patellofemoral disorders is generalized to the anterior part of the knee. One important concept in patellofemoral joint function is the quadriceps angle (Q-angle). Theoretically, a higher Q-angle increases the lateral pull o...

INTRODUCTION Since most studies on ankle sprain are medical and sports-related and not much epidemiologic and etiologic data from the general population exist in this field, the present study evaluates the relationship between Q angle and anthropometric measures with ankle sprain in the general population. METHODS In the present case-control study, all of the patients over 18 years age presen...

BACKGROUND The relationship between one-leg static standing balance (OLSSB) and patellofemoral pain syndrome (PFPS) is unknown. HYPOTHESIS OLSSB decreases in patients with PFPS. DESIGN Prospective case series. METHODS Fifty-two women with unilateral PFPS were enrolled in this study. OLSSB was evaluated with a stabilometer. Q angle was measured with a lengthened-arm universal goniometer. L...

Q angle is defined as an acute angle between two imaginary lines drawn from the ASIS to the center of patella and from the center of the patella to the tibial tuberosity. Measuring of Q angle usually was conducted in the supine position by two main methods, invasive methods such as radiography and CT scan and non-invasive methods, including goniometer and photogrammetry. The purpose of this stu...