A Dieterich1, F Petzke2, C Pickard3, P Davey3, D Falla4. 1. Pain Clinic, Center for Anesthesiology, Emergency and Intensive Care Medicine, University Hospital Göttingen, Göttingen, Germany. Electronic address: angela.dieterich@bccn.uni-goettingen.de. 2. Pain Clinic, Center for Anesthesiology, Emergency and Intensive Care Medicine, University Hospital Göttingen, Göttingen, Germany. 3. School of Physiotherapy and Exercise Science, Faculty of Health Sciences, Curtin University, Perth, Australia. 4. Pain Clinic, Center for Anesthesiology, Emergency and Intensive Care Medicine, University Hospital Göttingen, Göttingen, Germany; Department of Neurorehabilitation Engineering, Bernstein Center for Computational Neuroscience, Göttingen, Germany.
Abstract
BACKGROUND: Knowledge on task-specific activity of the deep hip abductor muscles is limited and is required for determining appropriate hip abductor exercises. OBJECTIVES: To assess the temporal differentiation of activity of gluteus minimus and the deep and the superficial regions of gluteus medius during weight bearing and non-weight bearing exercises. DESIGN: Repeated measures design on a single recording occasion. METHOD: M-mode ultrasound was used to capture activity-related muscle motion of the gluteus minimus and medius muscles in 20 healthy volunteers during weight shift, hip hitch, side-lying abduction and active leg lengthening exercises. M-mode traces were computer-processed for detecting muscle motion onsets. Mean onset differences between muscle regions and their intra-individual variability were assessed. RESULTS: In contrast to side-lying abduction, the weight shift and hip hitch exercises resulted in larger onset variability between the gluteus minimus and deep gluteus medius (P < 0.001) and also between the deep and superficial regions of the gluteus medius (P < 0.05). CONCLUSIONS: Weight bearing exercises promoted a greater functional differentiation between deep and superficial hip abductor muscles.
BACKGROUND: Knowledge on task-specific activity of the deep hip abductor muscles is limited and is required for determining appropriate hip abductor exercises. OBJECTIVES: To assess the temporal differentiation of activity of gluteus minimus and the deep and the superficial regions of gluteus medius during weight bearing and non-weight bearing exercises. DESIGN: Repeated measures design on a single recording occasion. METHOD: M-mode ultrasound was used to capture activity-related muscle motion of the gluteus minimus and medius muscles in 20 healthy volunteers during weight shift, hip hitch, side-lying abduction and active leg lengthening exercises. M-mode traces were computer-processed for detecting muscle motion onsets. Mean onset differences between muscle regions and their intra-individual variability were assessed. RESULTS: In contrast to side-lying abduction, the weight shift and hip hitch exercises resulted in larger onset variability between the gluteus minimus and deep gluteus medius (P < 0.001) and also between the deep and superficial regions of the gluteus medius (P < 0.05). CONCLUSIONS: Weight bearing exercises promoted a greater functional differentiation between deep and superficial hip abductor muscles.
Authors: Carlos Romero-Morales; Cesar Calvo-Lobo; Emmanuel Navarro-Flores; Victoria Mazoteras-Pardo; Paula García-Bermejo; Daniel López-López; Eva María Martínez-Jiménez; Blanca De-la-Cruz-Torres Journal: Healthcare (Basel) Date: 2020-12-11