Added body mass alters plantar shear stresses, postural control, and gait kinetics: Implications for obesity

Autor: Spencer R. Petersen, A. Wayne Johnson, Hwigeum Jeong, Jared M. Staten, Dustin A. Bruening, J. Brent Feland
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Male
Sensory Receptors
Kinematics
Physiology
Social Sciences
Walking
Body Mass Index
0302 clinical medicine
Medicine and Health Sciences
Medicine
Psychology
Shear Stresses
Gait
Postural Balance
Multidisciplinary
Feet
Physics
Classical Mechanics
Shear (sheet metal)
Physiological Parameters
Physical Sciences
Standing Position
VEST
Mechanical Stress
Legs
Sensory Perception
Analysis of variance
Anatomy
Mechanoreceptors
Research Article
Signal Transduction
Adult
medicine.medical_specialty
Cognitive Neuroscience
Science
Shear force
Context (language use)
03 medical and health sciences
Motor Reactions
Young Adult
Physical medicine and rehabilitation
Humans
Obesity
business.industry
Biological Locomotion
Foot
Body Weight
Cognitive Psychology
Repeated measures design
Biology and Life Sciences
030229 sport sciences
Cell Biology
Postural Control
Body Limbs
Cognitive Science
Perception
business
030217 neurology & neurosurgery
Center of pressure (fluid mechanics)
Neuroscience
Zdroj: PLoS ONE, Vol 16, Iss 2, p e0246605 (2021)
PLoS ONE
ISSN: 1932-6203
Popis: Context Obesity is a growing global health concern. The increased body mass and altered mass distribution associated with obesity may be related to increases in plantar shear that putatively leads to physical functional deficits. Therefore, measurement of plantar shear may provide unique insights on the effects of body mass and body distribution on physical function or performance. Purpose 1) To investigate the effects of body mass and distribution on plantar shear. 2) To examine how altered plantar shear influences postural control and gait kinetics. Hypothesis 1) a weighted vest forward distributed (FV) would shift the center of pressure (CoP) location forward during standing compared with a weighted vest evenly distributed (EV), 2) FV would increase plantar shear spreading forces more than EV during standing, 3) FV would increase postural sway during standing while EV would not, and 4) FV would elicit greater compensatory changes during walking than EV. Methods Twenty healthy young males participated in four different tests: 1) static test (for measuring plantar shear and CoP location without acceleration, 2) bilateral-foot standing postural control test, 3) single-foot standing postural test, and 4) walking test. All tests were executed in three different weight conditions: 1) unweighted (NV), 2) EV with 20% added body mass, and 3) FV, also with 20% added body mass. Plantar shear stresses were measured using a pressure/shear device, and several shear and postural control metrics were extracted. Repeated measures ANOVAs with Holms post hoc test were used to compare each metric among the three conditions (α = 0.05). Results FV and EV increased both AP and ML plantar shear forces compared to NV. FV shifted CoP forward in single-foot trials. FV and EV showed decreased CoP range and velocity and increased Time-to-Boundary (TTB) during postural control compared to NV. EV and FV showed increased breaking impulse and propulsive impulse compared to NV. In addition, EV showed even greater impulses than FV. While EV increased ML plantar shear spreading force, FV increased AP plantar shear spreading force during walking. Conclusion Added body mass increases plantar shear spreading forces. Body mass distribution had greater effects during dynamic tasks. In addition, healthy young individuals seem to quickly adapt to external stimuli to control postural stability. However, as this is a first step study, follow-up studies are necessary to further support the clinical role of plantar shear in other populations such as elderly and individuals with obesity or diabetes.
Databáze: OpenAIRE
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