Inter-limb strength asymmetry in adolescent distance runners: test-retest reliability and relationships with performance and running economy
Article
Blagrove, R., Bishop, C., Howatson, G. and Hayes, P. 2021. Inter-limb strength asymmetry in adolescent distance runners: test-retest reliability and relationships with performance and running economy. Journal of Sports Sciences. 39 (3), pp. 312-321. https://doi.org/10.1080/02640414.2020.1820183
Type | Article |
---|---|
Title | Inter-limb strength asymmetry in adolescent distance runners: test-retest reliability and relationships with performance and running economy |
Authors | Blagrove, R., Bishop, C., Howatson, G. and Hayes, P. |
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. |
Keywords | symmetry, imbalance, between-limb difference, endurance running |
Research Group | Strength and Conditioning at the London Sport Institute |
Publisher | Routledge |
Journal | Journal of Sports Sciences |
ISSN | 0264-0414 |
Electronic | 1466-447X |
Publication dates | |
Online | 13 Sep 2020 |
01 Feb 2021 | |
Publication process dates | |
Deposited | 04 Sep 2020 |
Submitted | 04 Mar 2020 |
Accepted | 01 Sep 2020 |
Output status | Published |
Accepted author manuscript | |
Copyright Statement | This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Sports Sciences on 13 Sep 2020, available online: http://www.tandfonline.com/10.1080/02640414.2020.1820183 |
Digital Object Identifier (DOI) | https://doi.org/10.1080/02640414.2020.1820183 |
Language | English |
https://repository.mdx.ac.uk/item/890w8
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