Change in muscle thickness during exercise to stabilize the hip joint against a load in the ventral direction of the femoral head

Abstract

This study aimed to measure the thickness of the muscles located on the ventral side of the hip joint and to identify the muscles involved in exercise against the load that results in femoral head translation in the ventral direction, which can be used as an index of exercise performance for the prevention and improvement of hip joint disease caused by femoral head translation. [Participants and Methods] The participants were 10 healthy young males. During the measurement task, we asked them to hold a 10 kgf load in the ventral direction to the femoral head in the supine position. We measured the thickness of the gluteus minimus, gluteus medius, tensor fascia latae, and iliopsoas both at rest and during exercise using ultrasonography. [Results] We compared muscle thicknesses at rest and during exercise and found that only the gluteus minimus had significantly lower values during exercise. We also compared the rate of change in muscle thickness and found that the gluteus minimus exhibited significantly higher values than those of the gluteus medius and tensor fasciae latae. [Conclusion] Our study indicates that the gluteus minimus is more involved than the gluteus medius, tensor fasciae latae, and iliopsoas in the exercise for the ventral displacement of the femoral head.

Impact of Femoral Neck Cortical Bone Defect Induced by Core Decompression on Postoperative Stability: A Finite Element Analysis

“…Results showed that femoral neck (inferior) > femoral neck (superior) > femoral neck (posterior) > femoral neck (anterior). Previous studies have also demonstrated that the stress transmitted downward through the femoral head is mainly distributed in the lower part of the femoral neck (the pressure side) and is also the main fracture site as the load increases [35]. As shown in Figure 7, there was a bone defect on the pressure side of the cortical bone defect model at the lower part of the femoral neck.…”

“…neck. Under normal circumstances, the load transmitted from the femoral head to the femoral neck is not in a straight line due to the femoral neck shaft angle and anterior angle, resulting in tension, pressure, and shear force at the femoral neck, which is mainly concentrated at the lower part of the femoral head-neck joint [35]. This was similar to those of our study, and the same mechanism was applicable to our study, showing that the standard operating model does not alter the stress distribution in the femoral neck region.…”

Relationship between iliopsoas muscle thickness and hip angle during squats in different pelvic positions

“…Additionally, as mentioned above, ultrasonic muscle thickness measurements do not directly reflect muscle activity; therefore, the present study can only describe the possibility that muscle activity occurred in relation to muscle thickness changes and joint angle changes. It has been reported that changes in muscle thickness do not necessarily reflect muscle activity and that muscle thickness is influenced by myofascial extensibility 19) , the region measured 20) , and the strength of contraction 21) . Thus, caution should be observed while interpretating the results of this study with respect to increase in muscle thickness and muscle activity.…”