The maximum CSA of the gluteus maximus was found just above the femoral head and that of the gluteus medius was near the lowest end of the sacroiliac joint; hence, CSAs should be calculated at these sites. The CSA reflected muscle volume and strength.
[Purpose] Increased compensatory pelvic movement is remarkable in limping patients with
hip osteoarthritis (OA). However, a method of improving limping has not been established.
The purpose of this study was to identify the effects of two types of Nordic walking by
analyzing the pelvic movement and muscle activities of adults with hip OA. [Subjects and
Methods] Ten patients with OA of the hip performed Japanese-style Nordic walking (JS NW),
European-style Nordic walking (ES NW), and Ordinary walking (OW), and the muscle
activities around the hip joint and pelvic movements were analyzed. [Results] The pelvic
rotation angle was significantly larger in ES NW than in JS NW. In the stance phase, hip
abductor muscle activity was significantly decreased in JS NW compared to both OW and ES
NW. In the swing phase, rectus abdominis muscle activity was significantly increased in
both JS NW and ES NW compared to OW and lumbar erector spinae activity was significantly
lower in JS NW than in OW. [Conclusion] JS NW style may reduce the compensatory pelvic
rotation in patients with hip OA. JS NW might be better for joint protection and
prevention of secondary disorders of the hip in OA patients.
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