Establishing the Noise: Interday Ecological Reliability of Countermovement Jump Variables in Professional Rugby Union Players.
J Strength Cond Res
; 36(11): 3159-3166, 2022 Nov 01.
Article
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| MEDLINE
| ID: mdl-33966010
ABSTRACT
ABSTRACT Howarth, DJ, Cohen, DD, McLean, BD, and Coutts, AJ. Establishing the noise interday ecological reliability of countermovement jump variables in professional rugby union players. J Strength Cond Res 36(11) 3159-3166, 2022-The purpose of this study was to examine the interday "ecological" reliability of a wide range of ground reaction force-derived countermovement jump (CMJ) variables. Thirty-six male, professional rugby union players performed 3 CMJs on 4 separate days over an 8-day period during the first week of preseason. We calculated reliability for 86 CMJ variables across 5 interday combinations using 2 criteria mean output across 3 jump trials (Mean 3 ) and single output from the highest jump (Best JH ). Interday coefficient of variation (CV) of the 86 variables in each CMJ phase, for Mean 3 and Best JH , respectively, ranged between concentric = 2-11% and 2-13%; eccentric = 1-45% and 1-107%; and landing = 4-32% and 6-45%. Mean 3 interday CV was lower in all 86 variables across every interday combination, compared with Best JH . CVs were lower in our cohort than previous studies, particularly for eccentric phase variables. There was no meaningful difference between interday conditions, suggesting any 2-day combination conducted within the first 8 days of preseason, represents a measure of "noise." We did not apply arbitrary reliability "cut-offs" used in previous work (e.g., CV <10%); therefore, our analysis provides reference reliability for a wide range of CMJ variables. However, we recommend that practitioners assess reliability in their athletes, as it is likely to be environment, protocol, and cohort specific.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Rendimiento Atlético
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Rugby
Tipo de estudio:
Etiology_studies
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Incidence_studies
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Observational_studies
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Risk_factors_studies
Límite:
Humans
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Male
Idioma:
En
Revista:
J Strength Cond Res
Asunto de la revista:
FISIOLOGIA
Año:
2022
Tipo del documento:
Article
País de afiliación:
Australia