Minimal effects of age and prolonged physical and mental exercise on healthy adults' gait.

Autor: Santos PCRD; University of Groningen, University Medical Center Groningen, Center for Human Movement Sciences, Groningen, the Netherlands; São Paulo State University (UNESP), Post-graduation Program in Movement Sciences, Institute of Biosciences, Posture and Gait Studies Laboratory (LEPLO), Rio Claro, Brazil. Electronic address: p.c.rocha.dos.santos@umcg.nl., Hortobágyi T; University of Groningen, University Medical Center Groningen, Center for Human Movement Sciences, Groningen, the Netherlands., Zijdewind I; Department of Biomedical Sciences of Cells and Systems, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands., Bucken Gobbi LT; São Paulo State University (UNESP), Post-graduation Program in Movement Sciences, Institute of Biosciences, Posture and Gait Studies Laboratory (LEPLO), Rio Claro, Brazil., Barbieri FA; São Paulo State University (UNESP), Post-graduation Program in Movement Sciences, Human Movement Research Laboratory (MOVI-LAB), Department of Physical Education, Bauru, Brazil., Lamoth C; University of Groningen, University Medical Center Groningen, Center for Human Movement Sciences, Groningen, the Netherlands.
Jazyk: angličtina
Zdroj: Gait & posture [Gait Posture] 2019 Oct; Vol. 74, pp. 205-211. Date of Electronic Publication: 2019 Sep 17.
DOI: 10.1016/j.gaitpost.2019.09.017
Abstrakt: Background: Gait adaptability in old age can be examined by responses to various perturbations. Fatigability due to mental or muscle exercises can perturb internal cognitive and muscle resources, necessitating adaptations in gait.
Research Question: What are the effects of age and mental and muscle fatigability on stride outcomes and gait variability?
Methods: Twelve older (66-75yrs) and twelve young (20-25 yrs) adults walked at 1.2 m/s before and after two fatigue conditions in two separate sessions. Fatigue conditions were induced by repetitive sit-to-stand task (RSTS) and by 30-min of mental tasks and randomized between days (about a week apart). We calculated the average and coefficient of variation of stride length, width, single support, swing time and cadence, and the detrended fluctuations analysis (DFA) based on 120 strides time intervals. We also calculated multi-scale sample entropy (MSE) and the maximal Lyapunov exponent (λmax) of mediolateral (ML) and anteroposterior (AP) of the Center of Pressure (CoP) trajectories.
Results: In both age groups, RSTS modestly affected stride length, single support time, cadence, and CV of stride length (p ≤ 0.05), while the mental task did not affect gait. After fatigability, λmax - ML increased (p ≤ 0.05), independent of fatigue condition. All observed effects were small (η²: 0.001 to 0.02).
Significance: Muscle and mental fatigability had minimal effects on gait in young and healthy older adults possibly because treadmill walking makes gait uniform. It is still possible that age-dependent muscle activation underlies the uniform gait on the treadmill. Age- and fatigability effects might be more overt during real life compared with treadmill walking, creating a more effective model for examining gait and age adaptability to fatigability perturbations.
(Copyright © 2019 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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