Physiological and anthropometric determinants of critical power, W’ and the reconstitution of W’ in trained and untrained male cyclists

Chorley, Alan and Bott, Richard and Marwood, Simon and Lamb, Kevin (2020) Physiological and anthropometric determinants of critical power, W’ and the reconstitution of W’ in trained and untrained male cyclists. European Journal of Applied Physiology, 120 (11). pp. 2349-2359. ISSN 1439-6319

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Purpose: This study examined the relationship of physiological and anthropometric characteristics with
parameters of the critical power (CP) model, and in particular the reconstitution of W’ following successive bouts of maximal exercise, amongst trained and untrained cyclists.
Methods: Twenty male adults (trained 9; untrained 11; age 39 ± 15 y; mass 74.7 ± 8.7 kg; V̇ O2max 58.0 ± 8.7 mL·kg−1
·min−1) completed 3 incremental ramps (20 W·min−1
) to exhaustion interspersed with 2-min recoveries.
Pearson’s correlation coefficients were used to assess relationships for W’ reconstitution after the first recovery (W’rec1), the delta in W’ reconstituted between recoveries (∆W’rec), CP and W’.
Results: CP was strongly related to V̇ O2max for both trained (r = 0.82) and untrained participants (r = 0.71),
whereas W’ was related to V̇ O2max when both groups were considered together (r = 0.54). W’rec1 was strongly
related to V̇ O2max for the trained (r = 0.81) but not untrained (r = 0.18); similarly, ∆W’rec was strongly related to V̇ O2max (r = -0.85) and CP (r = -0.71) in the trained group only.
Conclusions: Notable physiological relationships between parameters of aerobic fitness and the measurements of
W’ reconstitution were observed, which differed among groups. The amount of W’ reconstitution and the
maintenance of W’ reconstitution that occurred with repeated bouts of maximal exercise were found to be related
to key measures of aerobic fitness such as CP and V̇ O2max. This data demonstrates that trained cyclists wishing to improve their rate of W’ reconstitution following repeated efforts should focus training on improving key aspects of aerobic fitness such as V̇ O2max and CP.

Item Type: Article
Additional Information and Comments: Open Access: This article is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit The final, published version is available from:
Keywords: W′ reconstitution Cycling Fatigue Recovery Correlation
Faculty / Department: Faculty of Science > School of Health Sciences
Depositing User: Simon Marwood
Date Deposited: 25 May 2021 11:11
Last Modified: 25 May 2021 11:11

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