Volume 19, Issue 3 (September 2021)                   Iranian Rehabilitation Journal 2021, 19(3): 273-278 | Back to browse issues page


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1- Department of Orthotics and Prosthetics, California State University Dominguez Hills, USA.
2- Department of Biomedical Engineering, National Centre for Prosthetics and Orthotics, University of Strathclyde, United Kingdom.
Abstract:   (475 Views)
Objectives: Improving the timing and endurance of the deep abdominal muscles, notably transversus abdominis (TrA), is a known protocol for improving spinal stability. TrA is the deepest abdominal muscle, and monitoring its activity is a difficult task. Ultrasound and pressure biofeedback have been employed for monitoring the activity of TrA; however, these methods are expensive, not always available in all clinical settings, and their application requires formal training. The purpose of this study was to examine the use of a broadly known method, i.e., changes in the waist circumference, to monitor the activity of TrA. 
Methods: The study was carried out on 14 subjects following a pilot study of 5 participants. The thickness of TrA measured by ultrasound was considered the standard indicator for activity of TrA and was compared with simuObjectives: Improving the timing and endurance of the deep abdominal muscles, notably transversus abdominis (TrA), is a known protocol for improving spinal stability. TrA is the deepest abdominal muscle, and monitoring its activity is a difficult task. Ultrasound and pressure biofeedback have been employed for monitoring the activity of TrA; however, these methods are expensive, not always available in all clinical settings, and their application requires formal training. The purpose of this study was to examine the use of a broadly known method, i.e., changes in the waist circumference, to monitor the activity of TrA. 
Methods: The study was carried out on 14 subjects following a pilot study of 5 participants. The thickness of TrA measured by ultrasound was considered the standard indicator for activity of TrA and was compared with simultaneous measurement of waist circumference. 
Results: A significant criterion validity between the thickness of TrA and the waist circumference was established (Pearson correlation=-0.71, P=0.001), indicating an inverse relationship between changes in the thickness of the transversus abdominis muscle and waist circumference.
Discussion: This result confirmed the hypothesis that changes in the waist circumference could be employed as a suitable indicator for the activity of TrA.ltaneous measurement of waist circumference. 
Results: A significant criterion validity between the thickness of TrA and the waist circumference was established (Pearson correlation=-0.71, P=0.001), indicating an inverse relationship between changes in the thickness of the transversus abdominis muscle and waist circumference.
Discussion: This result confirmed the hypothesis that changes in the waist circumference could be employed as a suitable indicator for the activity of TrA.

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Article type: Original Research Articles | Subject: Orthosis and Prosthesis
Received: 2021/04/6 | Accepted: 2021/08/6 | Published: 2021/09/1

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