An assessment of the hopping strategy and inter-limb asymmetry during the triple hop test: a test–retest pilot study

Davey, Kyle, Read, Paul, Coyne, Joseph, Jarvis, Paul ORCID logoORCID:, Turner, Anthony N. ORCID logoORCID:, Brazier, Jon ORCID logoORCID:, Šarabon, Nejc ORCID logoORCID:, Jordan, Matthew J. and Bishop, Chris ORCID logoORCID: (2021) An assessment of the hopping strategy and inter-limb asymmetry during the triple hop test: a test–retest pilot study. Symmetry, 13 (10) . e1890. ISSN 2073-8994 [Article] (doi:10.3390/sym13101890)

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The aims of the present study are to: (1) determine within- and between-session reliability of multiple metrics obtained during the triple hop test; and (2) determine any systematic bias in both the test and inter-limb asymmetry scores for these metrics. Thirteen male young American football athletes performed three trials of a triple hop test on each leg on two separate occasions. In addition to the total distance hopped, manual detection of touch down and toe-off were calculated via video analysis, enabling flight time (for each hop), ground contact time (GCT), reactive strength index (RSI), and leg stiffness (between hops) to be calculated. Results showed all coefficient of variation (CV) values were ≤ 10.67% and intraclass correlation coefficients (ICC) ranged from moderate to excellent (0.53–0.95) in both test sessions. Intrarater reliability showed excellent reliability for all metrics (CV ≤ 3.60%, ICC ≥ 0.97). No systematic bias was evident between test sessions for raw test scores (g = −0.34 to 0.32) or the magnitude of asymmetry (g = −0.19 to 0.43). However, ‘real’ changes in asymmetry (i.e., greater than the CV in session 1) were evident on an individual level for all metrics. For the direction of asymmetry, kappa coefficients revealed poor-to-fair levels of agreement between test sessions for all metrics (K = −0.10 to 0.39), with the exception of the first hop (K = 0.69). These data show that, given the inherent limitations of distance jumped in the triple hop test, practitioners can confidently gather a range of reliable data when computed manually, provided sufficient test familiarization is conducted. In addition, although the magnitude of asymmetry appears to show only small changes between test sessions, limb dominance does appear to fluctuate between test sessions, highlighting the value of also monitoring the direction of the imbalance.

Item Type: Article
Keywords (uncontrolled): triple hop test, reactive strength index, leg stiffness, strategy metrics
Research Areas: A. > School of Science and Technology > London Sport Institute > Strength and Conditioning at the London Sport Institute
Item ID: 33956
Notes on copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
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Depositing User: Jisc Publications Router
Date Deposited: 12 Oct 2021 07:59
Last Modified: 12 Oct 2021 07:59

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