Normal hip, knee and ankle range of motion in the Turkish population

The aim of this study was to ascertain the effect of gender and cultural habits on hip, knee and ankle range of motion (ROM) and to determine the differences between the ROM of right and left side symmetric joints of the lower extremities.

The study included 987 (513 males and 474 females) healthy volunteers. Individuals with a history of illness, prior surgery or trauma involving any joint of either lower extremity were excluded from the study. The terminology and techniques of measurements used were those suggested by the American Academy of Orthopedic Surgeons.

Left side passive hip flexion and active internal rotation was higher than the right side. Passive flexion of the hip joint was higher in male subjects and internal and external rotation was higher in female subjects. In the knee joint, passive extension was higher in males. Plantarflexion and inversion of the ankle joint were higher in male subjects and dorsiflexion and eversion were higher in female subjects. The differences were considered insignificant in clinical terms as all were less than 3 degrees.

There is no clinically significantly difference between right and left side hip, knee and ankle joints ROM. Gender and cultural habits do not appear to have clinically significantly effects on lower extremity joint ROM.