Details

Autor(en) / Beteiligte

• Bourgois, Gil
• Mucci, Patrick
• Boone, Jan
• Colosio, Alessandro L.
• Bourgois, Jan G.
• Pogliaghi, Silvia
• Caen, Kevin

Titel

Critical power, W′ and W′ reconstitution in women and men

Ist Teil von

• European journal of applied physiology, 2023-12, Vol.123 (12), p.2791-2801

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2023

Link zum Volltext

Quelle

SpringerLink (Online service)

Beschreibungen/Notizen

• 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 ( V ˙ O 2PEAK : 2.53 ± 0.37 L·min −1 ) and 12 men ( V ˙ 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.