Volume 12, Issue 3 (11-2026)                   J Sport Biomech 2026, 12(3): 570-604 | Back to browse issues page

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Abbasi S, Farahpour N, Heidari B, Moisan G, Allard P. Pivoting Gait Reveals Side-Specific Deficits in Horizontal Forces in Adolescent Idiopathic Scoliosis with Lumbar Curvatures: A Cross-Sectional Study. J Sport Biomech 2026; 12 (3) :570-604
URL: http://biomechanics.iauh.ac.ir/article-1-511-en.html
Pivoting Gait Reveals Side-Specific Deficits in Horizontal Forces in Adolescent Idiopathic Scoliosis with Lumbar Curvatures: A Cross-Sectional Study
Soha Abbasi1 , Nader Farahpour *1 , Bizhan Heidari2 , Gabriel Moisan3 , Paul Allard4
1- Department of Sport Biomechanics, Faculty of Sport Sciences, Bu-Ali Sina University, Hamedan, Iran.
2- Department of Orthopedics, School of Medicine, Hamedan University of Medical Sciences, Hamedan, Iran.
3- Department of Human Kinetics, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada.
4- Kinesiology Department, Montreal University, Québec, Canada.
Abstract:   (28 Views)
Objective This study investigated spatiotemporal parameters and ground reaction force (GRF) components during straight and pivoting gait in adolescents with lumbar adolescent idiopathic scoliosis (AIS), with particular emphasis on differences between left and right lumbar curvatures.
Methods In this cross-sectional study, 16 healthy individuals served as the control group (CG), while 14 patients with lumbar adolescent idiopathic scoliosis (AIS) formed the main scoliosis group (MSG), which was further divided into left lumbar (LL) and right lumbar (RL) subgroups. Spatiotemporal parameters and GRF components were analyzed during straight and pivoting gait for the leading, pivoting, and trailing feet.
Results No significant differences in spatiotemporal parameters were observed during straight gait. However, during pivoting gait, the right lumbar (RL) subgroup exhibited a longer stance time and altered horizontal ground reaction force (GRF) components. In addition, the RL subgroup showed a greater GRFX1 impulse in the left leading foot than both the control group and the left lumbar (LL) subgroup. No comparable changes were observed in the LL subgroup.
Conclusion Right lumbar scoliosis was associated with altered horizontal GRF components during pivoting gait, whereas left lumbar scoliosis showed no comparable changes. These findings suggest that lumbar curvature direction influences neuromusculoskeletal behavior during pivoting and should be considered when developing subgroup-specific rehabilitation strategies.
Keywords: Adolescent idiopathic scoliosis, Lumbar scoliosis, Pivoting gait, Ground reaction force, Spatiotemporal parameters
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Type of Study: Research | Subject: Special
Received: 2026/04/27 | Accepted: 2026/07/31 | Published: 2026/08/2
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