Influence of sex-specific concurrent changes in age, maturity status, and morphological covariates on the development of peak ventilatory variables in 10-17-year-olds.
Eur J Appl Physiol
; 121(3): 783-792, 2021 Mar.
Article
em En
| MEDLINE
| ID: mdl-33289062
ABSTRACT
PURPOSES:
(i) To investigate the influence of concurrent changes in age, maturity status, stature, body mass, and skinfold thicknesses on the development of peak ventilatory variables in 10-17-year-olds; and, (ii) to evaluate the interpretation of paediatric norm tables of peak ventilatory variables.METHODS:
Multiplicative multilevel modelling which allows both the number of observations per individual and the temporal spacing of the observations to vary was used to analyze the expired ventilation (peak [Formula see text]) and tidal volume (peak VT) at peak oxygen uptake of 420 (217 boys) 10-17-year-olds. Models were founded on 1053 (550 from boys) determinations of peak ventilatory variables supported by anthropometric measures and maturity status.RESULTS:
In sex-specific, multiplicative allometric models, concurrent changes in body mass and skinfold thicknesses (as a surrogate of FFM) and age were significant (p < 0.05) explanatory variables of the development of peak [Formula see text], once these covariates had been controlled for stature had no additional, significant (p > 0.05) effect on peak [Formula see text]. Concurrent changes in age, stature, body mass, and skinfold thicknesses were significant (p < 0.05) explanatory variables of the development of peak VT. Maturity status had no additional, significant (p > 0.05) effect on either peak [Formula see text] or peak VT once age and morphological covariates had been controlled for.CONCLUSIONS:
Elucidation of the sex-specific development of peak [Formula see text] requires studies which address concurrent changes in body mass, skinfold thicknesses, and age. Stature is an additional explanatory variable in the development of peak VT, in both sexes. Paediatric norms based solely on age or stature or body mass are untenable.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Consumo de Oxigênio
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Maturidade Sexual
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Dobras Cutâneas
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Exercício Físico
Tipo de estudo:
Prognostic_studies
Limite:
Adolescent
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Child
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Female
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Humans
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Male
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article