Ankle and knee extensor muscle effort during locomotion in young and older athletes : Implications for understanding age-related locomotor decline

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Kulmala , J-P , Korhonen , M T , Ruggiero , L , Kuitunen , S , Suominen , H , Heinonen , A , Mikkola , A & Avela , J 2020 , ' Ankle and knee extensor muscle effort during locomotion in young and older athletes : Implications for understanding age-related locomotor decline ' , Scientific Reports , vol. 10 , no. 1 , 2801 . https://doi.org/10.1038/s41598-020-59676-y

Title: Ankle and knee extensor muscle effort during locomotion in young and older athletes : Implications for understanding age-related locomotor decline
Author: Kulmala, Juha-Pekka; Korhonen, Marko T.; Ruggiero, Luca; Kuitunen, Sami; Suominen, Harri; Heinonen, Ari; Mikkola, Aki; Avela, Janne
Contributor organization: HUS Children and Adolescents
Children's Hospital
University of Helsinki
Helsinki University Hospital Area
Date: 2020-02-18
Language: eng
Number of pages: 7
Belongs to series: Scientific Reports
ISSN: 2045-2322
DOI: https://doi.org/10.1038/s41598-020-59676-y
URI: http://hdl.handle.net/10138/319427
Abstract: Age-related reduction in muscle force generation capacity is similarly evident across different lower limb muscle groups, yet decline in locomotor performance with age has been shown to depend primarily on reduced ankle extensor muscle function. To better understand why ageing has the largest detrimental effect on ankle joint function during locomotion, we examined maximal ankle and knee extensor force development during a two-leg hopping test in older and young men, and used these forces as a reference to calculate relative operating efforts for the knee and ankle extensors as participants walked, ran and sprinted. We found that, across locomotion modes in both age groups, ankle extensors operated at a greater relative effort compared to knee extensors; however, slightly less pronounced differences between ankle and knee extensor muscle efforts were present among older men, mainly due to a reduction in the ankle extensor force generation during locomotion modes. We consider these findings as evidence that reduced ankle push-off function in older age is driven by a tendency to keep ankle extensor effort during locomotion lower than it would otherwise be, which, in turn, may be an important self-optimisation strategy to prevent locomotor-induced fatigue of ankle extensor muscles.
Subject: STAIR ASCENT
WALKING
ADULTS
SPEED
GAIT
STRENGTH
POWER
BIOMECHANICS
MOVEMENTS
VELOCITY
315 Sport and fitness sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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