Prior upper body exercise reduces cycling work capacity but not critical power

Article


Johnson, Michael A., Mills, Dean E., Brown, Peter I. and Sharpe, Graham R.. 2014. "Prior upper body exercise reduces cycling work capacity but not critical power." Medicine and Science in Sports and Exercise. 46 (4), pp. 802-808. https://doi.org/10.1249/MSS.0000000000000159
Article Title

Prior upper body exercise reduces cycling work capacity but not critical power

ERA Journal ID9788
Article CategoryArticle
AuthorsJohnson, Michael A. (Author), Mills, Dean E. (Author), Brown, Peter I. (Author) and Sharpe, Graham R. (Author)
Journal TitleMedicine and Science in Sports and Exercise
Journal Citation46 (4), pp. 802-808
Number of Pages7
Year2014
PublisherLippincott Williams & Wilkins
Place of PublicationUnited States
ISSN0195-9131
1530-0315
Digital Object Identifier (DOI)https://doi.org/10.1249/MSS.0000000000000159
Web Address (URL)https://journals.lww.com/acsm-msse/Fulltext/2014/04000/Prior_Upper_Body_Exercise_Reduces_Cycling_Work.21.aspx
Abstract

Purpose: This study examined whether metabolite accumulation, induced by prior upper body exercise, affected the power–duration relationship for leg cycle ergometry.

Methods: Seven males performed, to the limit of tolerance and both without (L) and with (AL) prior severe-intensity arm-cranking exercise, an incremental cycling test and four constant power cycling tests to determine the parameters of the power–duration relationship: critical power (CP) and W'.

Results: At the onset of cycling exercise plasma lactate (L vs AL: 1.2 ± 0.1 vs 11.6 ± 2.9 mEq.L -1) and hydrogen ion (40.4 ± 1.3 vs 53.1 ± 4.3 nEq.L -1), concentrations were higher during AL compared with L, whereas the strong ion difference (37.8 ± 1.8 vs 32.4 ± 2.0 mEq.L -1) and bicarbonate concentration (25.7 ± 0.7 vs 18.3 ± 1.9 mEq.L -1) were lower during AL compared with L (P <0.01). During incremental exercise, maximum cycling power (358 ± 15 vs 332 ± 21 W) and peak oxygen uptake (VO2peak) (4.31 ± 0.36 vs 3.71 ± 0.44 L.min -1) were lower during AL compared with L (P <0.05). The rate of increase in plasma potassium concentration during constant power cycling was greater during AL compared with L (0.09 ± 0.08 vs 0.14 ± 0.13 mEq.L -1.min -1) (P <0.05), and exercise duration was 35 ± 15% shorter (P <0.01). CP was not different between L and AL (267± 19 vs 264 ± 20 W), whereas W' was lower in AL (17.3 ± 5.7 vs 11.8 ± 4.2 kJ) (P <0.01).

Conclusion: The reduced W' after prior upper body exercise indicates that the magnitude of W' is partly dependent on metabolite accumulation.

Keywordspower-duration relationship; metabolites, arm cranking; cycling
ANZSRC Field of Research 2020420702. Exercise physiology
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Byline AffiliationsNottingham Trent University, United Kingdom
University of Derby, United Kingdom
Institution of OriginUniversity of Southern Queensland
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