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

Blagrove, Richard C., Bishop, Chris, Howatson, Glyn and Hayes, Phil (2020) Inter-limb strength asymmetry in adolescent distance runners: Test-retest reliability and relationships with performance and running economy. Journal of Sports Sciences. pp. 1-10. ISSN 0264-0414 (In Press)

[img] Text
Accepted version_Asymmetry in adolescent runners REPOSITORY VERSION.pdf - Accepted Version
Restricted to Repository staff only until 13 September 2021.

Download (719kB) | Request a copy
Official URL: https://doi.org/10.1080/02640414.2020.1820183

Abstract

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.

Item Type: Article
Uncontrolled Keywords: Symmetry, imbalance, between-limb difference, endurance running
Subjects: C600 Sports Science
Department: Faculties > Health and Life Sciences > Sport, Exercise and Rehabilitation
Depositing User: John Coen
Date Deposited: 29 Oct 2020 14:56
Last Modified: 05 Nov 2020 15:03
URI: http://nrl.northumbria.ac.uk/id/eprint/44640

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics