Critical power, W' and W' reconstitution in women and men.

Autor: Bourgois G; Department of Movement and Sports Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium.; Univ. Lille, Univ. Artois, Univ. Littoral Côte d'Opale, ULR 7369-URePSSS-Unité de Recherche Pluridisciplinaire Sport Santé Société, 59000, Lille, France., Mucci P; Univ. Lille, Univ. Artois, Univ. Littoral Côte d'Opale, ULR 7369-URePSSS-Unité de Recherche Pluridisciplinaire Sport Santé Société, 59000, Lille, France., Boone J; Department of Movement and Sports Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium. jan.boone@ugent.be.; Center of Sports Medicine, Ghent University Hospital, Ghent, Belgium. jan.boone@ugent.be., Colosio AL; Department of Movement and Sports Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium., Bourgois JG; Department of Movement and Sports Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium.; Center of Sports Medicine, Ghent University Hospital, Ghent, Belgium., Pogliaghi S; Department of Movement and Sports Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium.; Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy., Caen K; Department of Movement and Sports Sciences, Ghent University, Watersportlaan 2, 9000, Ghent, Belgium.; Center of Sports Medicine, Ghent University Hospital, Ghent, Belgium.
Jazyk: angličtina
Zdroj: European journal of applied physiology [Eur J Appl Physiol] 2023 Dec; Vol. 123 (12), pp. 2791-2801. Date of Electronic Publication: 2023 Jun 28.
DOI: 10.1007/s00421-023-05268-3
Abstrakt: Purpose: The aim of this study was to compare critical power (CP) and work capacity W', and W' reconstitution (W' REC ) following repeated maximal exercise between women and men.
Methods: Twelve women ([Formula: see text]O 2PEAK : 2.53 ± 0.37 L·min -1 ) and 12 men ([Formula: see text]O 2PEAK : 4.26 ± 0.30 L·min -1 ) performed a minimum of 3 constant workload tests, to determine CP and W', and 1 maximal exercise repetition test with three work bouts (WB) to failure, to quantify W' REC during 2 recovery periods, i.e., W' REC1 and W' REC2 . An independent samples t test was used to compare CP and W' values between women and men, and a repeated-measures ANOVA was used to compare W' REC as fraction of W' expended during the first WB, absolute W' REC , and normalized to lean body mass (LBM).
Results: CP normalized to LBM was not different between women and men, respectively, 3.7 ± 0.5 vs. 4.1 ± 0.4 W·kg LBM -1 , while W' normalized to LBM was lower in women 256 ± 29 vs. 305 ± 45 J·kg LBM -1 . Fractional W' REC1 was higher in women than in men, respectively, 74.0 ± 12.0% vs. 56.8 ± 9.5%. Women reconstituted less W' than men in absolute terms (8.7 ± 1.2 vs. 10.9 ± 2.0 kJ) during W' REC1 , while normalized to LBM no difference was observed between women and men (174 ± 23 vs. 167 ± 31 J·kg LBM -1 ). W' REC2 was lower than W' REC1 both in women and men.
Conclusion: Sex differences in W' REC (absolute women < men; fractional women > men) are eliminated when LBM is accounted for. Prediction models of W' REC might benefit from including LBM as a biological variable in the equation. This study confirms the occurrence of a slowing of W' REC during repeated maximal exercise.
(© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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