Relationship between Femoral and Coxal Movements during Unilateral Hip Flexion Exercises in the Standing Position in Healthy Young Females

Abstract

[Purpose] This study aimed to assess the coxal-femoral rhythm during unilateral hip flexion exercises in the standing position and to verify the difference between left and right coxal posterior tilt movements. [Participants and Methods] The subjects were 30 healthy female university students (mean age 20.5 ± 0.6 years). We measured the angle formed by the line connecting the anterior and superior iliac crests and the horizontal in the sagittal plane on the left and right sides: that is, the coxal posterior tilt angle, with hip flexion on the right side in the standing position. [Results] Flexion of the hip joint was accompanied by a significant angle of coxal posterior tilt. Moreover, there was no significant lateral difference in any hip flexion angle. [Conclusion] In healthy young females, we found no difference between the left and right coxal posterior tilt movements during flexion of the hip joint in the standing position. Furthermore, the coxal posterior tilt movement on the supporting leg side is predominant.