Blagrove_Asymmetry in adolescent runners REPOSITORY VERSION.pdf (1.24 MB)
Download file

Inter-limb strength asymmetry in adolescent distance runners: Test-retest reliability and relationships with performance and running economy

Download (1.24 MB)
journal contribution
posted on 13.11.2020, 14:37 authored by Richard BlagroveRichard Blagrove, Chris Bishop, Glyn Howatson, Philip R Hayes
© 2020 Informa UK Limited, trading as Taylor & Francis Group. The purpose of this investigation was, firstly, to quantify the test-retest reliability of strength measures in adolescent distance runners; and secondly, to explore the relationships between inter-limb strength asymmetry and performance and running economy (RE) in a similar cohort of young runners. For the reliability study, twelve (n = 6 female) post-pubertal adolescent distance runners performed an isometric quarter-squat on a dual force plate and unilateral isometric hip extension and hip abduction tests on two occasions. For the correlation study, participants (n = 31) performed the strength tests plus a submaximal incremental running assessment and a maximal running test. Running economy was expressed as the average energy cost of running for all speeds below lactate turnpoint and was scaled for body mass using a previously calculated power exponent. Allometrically scaled peak force during the quarter-squat and peak torque in the hip strength tasks showed acceptable levels of reproducibility (typical error ≤6.3%). Relationships between strength asymmetry and performance and RE were low or negligible (r < 0.47, p > 0.05), except for hip abduction strength asymmetry and RE in the female participants (r = 0.85, p < 0.001, n = 16). Practitioners should consider inter-limb hip abduction strength asymmetry on an individual level, and attempting to reduce this asymmetry in females may positively impact RE.

History

School

  • Sport, Exercise and Health Sciences

Published in

Journal of Sports Sciences

Volume

39

Issue

3

Pages

312 - 321

Publisher

Informa UK Limited

Version

AM (Accepted Manuscript)

Rights holder

© Taylor and Francis

Publisher statement

This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Sports Sciences on 13 Sep 2020, available online: https://doi.org/10.1080/02640414.2020.1820183

Acceptance date

01/09/2020

Publication date

2020-09-13

Copyright date

2020

ISSN

0264-0414

eISSN

1466-447X

Language

en

Location

England

Depositor

Dr Richard Blagrove. Deposit date: 12 November 2020