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A behavioral mechanism of how increases in leg strength improve old adults' gait speed.


ABSTRACT: We examined a behavioral mechanism of how increases in leg strength improve healthy old adults' gait speed. Leg press strength training improved maximal leg press load 40% (p?=?0.001) and isometric strength in 5 group of leg muscles 32% (p?=?0.001) in a randomly allocated intervention group of healthy old adults (age 74, n?=?15) but not in no-exercise control group (age 74, n?=?8). Gait speed increased similarly in the training (9.9%) and control (8.6%) groups (time main effect, p?=?0.001). However, in the training group only, in line with the concept of biomechanical plasticity of aging gait, hip extensors and ankle plantarflexors became the only significant predictors of self-selected and maximal gait speed. The study provides the first behavioral evidence regarding a mechanism of how increases in leg strength improve healthy old adults' gait speed.

SUBMITTER: Uematsu A 

PROVIDER: S-EPMC4195722 | biostudies-other | 2014

REPOSITORIES: biostudies-other

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A behavioral mechanism of how increases in leg strength improve old adults' gait speed.

Uematsu Azusa A   Tsuchiya Kazushi K   Kadono Norio N   Kobayashi Hirofumi H   Kaetsu Takamasa T   Hortobágyi Tibor T   Suzuki Shuji S  

PloS one 20141013 10


We examined a behavioral mechanism of how increases in leg strength improve healthy old adults' gait speed. Leg press strength training improved maximal leg press load 40% (p = 0.001) and isometric strength in 5 group of leg muscles 32% (p = 0.001) in a randomly allocated intervention group of healthy old adults (age 74, n = 15) but not in no-exercise control group (age 74, n = 8). Gait speed increased similarly in the training (9.9%) and control (8.6%) groups (time main effect, p = 0.001). Howe  ...[more]

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