To investigate the intra-and inter-rater reliabilities of measurements of the iliopsoas thickness, and the change in iliopsoas thickness due to hip flexion. [Participants and Methods] The participants were 13 healthy young males. Iliopsoas thickness was measured in hip flexion of 0, 15, 30, 45 and 60 degrees at the center of the groin area using sonography. The intra-and inter-rater reliabilities of measurements of iliopsoas thickness were calculated, and the iliopsoas thickness was compared among the hip flexion positions. [Results] When hip joint flexion was 45˚ or less, both the intra-and inter-rater reliabilities of measurements of the iliopsoas thickness were high. Systematic bias was not found at any of the hip flexion angles. The iliopsoas thickness increased with hip flexion. [Conclusion] Highly reproducible data can be obtained by measuring iliopsoas thickness at hip flexion of 45˚ or less. However, as the thickness of the iliopsoas thickness changes with hip flexion, making it necessary to consider the hip flexion angle when measuring it.
This study aimed to investigate the relationships among the changes in iliopsoas muscle thickness, hip angle, and lower limb joint moment during squatting in different pelvic positions to help in performing hip-dominant squatting exercises. [Participants and Methods] The participants were seven healthy adult males. The measurement task consisted of squatting with 60 degrees of knee flexion in three positions: the anterior, neutral, and posterior pelvic tilt positions. The iliopsoas muscle thickness was measured in the center of the inguinal region using ultrasonography. A three-dimensional motion analysis system was used to measure the joint angles and joint moments. [Results] There were no significant differences in pelvic angles between the pelvic positions. The hip angle differences were significantly higher in the anterior and neutral pelvic tilt positions compared to those in the posterior tilt position. Only the anterior pelvic tilt position had a significantly positive correlation with iliopsoas muscle thickness and hip angle differences. [Conclusion] Squatting in the neutral or posterior pelvic tilt position was not associated with hip angle and iliopsoas muscle thickness changes, whereas squatting in an anterior pelvic tilt position was associated with changes in the iliopsoas muscle thickness and hip flexion angle. Our findings suggest that activation of the iliopsoas muscle might be necessary to promote hip-dominant squatting.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.