Relationships between tibial accelerations and ground reaction forces during walking with load carriage.

Autor: Johnson CD; Military Performance Division, United States Army Institute of Environmental Medicine, Natick, MA 01760, USA. Electronic address: caleb.d.johnson24.civ@health.mil., Sara LK; College of Health and Rehabilitation Sciences, Boston University, Boston, MA 02215, USA., Bradach MM; Spaulding National Running Center, Spaulding Rehabilitation Hospital, Cambridge, MA 02138, USA., Mullineaux DR; Well-respected and experienced researcher., Foulis SA; Military Performance Division, United States Army Institute of Environmental Medicine, Natick, MA 01760, USA., Hughes JM; Military Performance Division, United States Army Institute of Environmental Medicine, Natick, MA 01760, USA., Davis IS; School of Physical Therapy and Rehabilitation Sciences, University of South Florida, Tampa, FL, USA.
Jazyk: angličtina
Zdroj: Journal of biomechanics [J Biomech] 2023 Jul; Vol. 156, pp. 111693. Date of Electronic Publication: 2023 Jun 20.
DOI: 10.1016/j.jbiomech.2023.111693
Abstrakt: Peak tibial accelerations (TAs) during running are strongly related to early stance vertical ground reaction forces (GRFs), which are associated with musculoskeletal injury. However, few studies have examined these correlations during walking, and none have evaluated them during walking with loads, a relevant activity for military personnel. Our purpose was to determine the relationships between GRFs and TAs in US Army trainees (n = 649) walking with loads. An inertial measurement unit was attached over their distal antero-medial tibia. Participants walked on an instrumented treadmill at 1.21-1.34 m/s, with a pack loaded with 18.1 kg, for a 3-min warm-up followed by a minimum of 14 strides of data collection. Simple linear regression models were calculated for peak vertical and resultant TAs with vertical and posterior GRF loading rates and peak forces. The strongest relationships were between vertical loading rates and peak vertical TA (R = 0.43-0.50), however the relationships were weaker than has been reported for unloaded walking and running (R > 0.7). All other relationships were trivial to small (R = 0.06-0.27). The weaker relationships for vertical GRFs and TAs may be due to methodological differences between studies, or differences in gait mechanics, such as a longer double-limb support phase in loaded vs. unloaded walking.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Published by Elsevier Ltd.)
Databáze: MEDLINE
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