Effects of prior upper body exercise on the 3-min all-out cycling test in men

Johnson, M.A. ORCID: 0000-0002-8226-9438, Williams, N.C. ORCID: 0000-0002-2607-4572, Graham, A.W., Ingram, L.A.L., Cooper, S.B. ORCID: 0000-0001-5219-5020 and Sharpe, G.R. ORCID: 0000-0002-4575-2332, 2020. Effects of prior upper body exercise on the 3-min all-out cycling test in men. Medicine & Science in Sports & Exercise. ISSN 0195-9131

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Abstract

Introduction: Prior upper body exercise reduces the curvature constant (W′) of the hyperbolic power-duration relationship without affecting critical power. This study tested the hypothesis that prior upper body exercise reduces the work done over the end-test power (WEP; analogue of W′) during a 3-min all-out cycling test (3MT) without affecting the end-test power (EP; analogue of critical power).

Methods: Ten endurance-trained men (V˙O2max = 62 ± 5 mL⋅kg-1⋅min-1) performed a 3MT without (CYC) and with (ARM-CYC) prior severe-intensity, intermittent upper body exercise. EP was calculated as the mean power output over the last 30-s of the 3MT, whereas WEP was calculated as the power-time integral above EP.

Results: At the start of the 3MT, plasma [La-] (1.8 ± 0.4 vs. 14.1 ± 3.4 mmol·L-1) and [H+] (42.8 ± 3.1 vs. 58.6 ± 5.5 nmol·L-1) were higher, whereas the strong ion difference ([SID]) (41.4 ± 2.2 vs. 30.9 ± 4.6 mmol·L-1) and [HCO3-] (27.0 ± 1.9 vs. 16.9 ± 3.2 mmol·L-1) were lower, during ARM-CYC than CYC (P < 0.010). EP was 12% lower during the 3MT of ARM-CYC (298 ± 52 W) than CYC (338 ± 60 W) (P < 0.001), whereas WEP was not different (CYC: 12.8 ± 3.3 kJ vs. ARM-CYC: 13.5 ± 4.1 kJ, P = 0.312). EP in CYC was positively correlated with the peak [H+] (r = 0.78, P = 0008), and negatively correlated with the lowest [HCO3-] (r = -0.74, P = 0.015).

Conclusion: These results suggest that EP during a 3MT in endurance-trained men is sensitive to fatigue-related ionic perturbation.

Item Type: Journal article
Publication Title: Medicine & Science in Sports & Exercise
Creators: Johnson, M.A., Williams, N.C., Graham, A.W., Ingram, L.A.L., Cooper, S.B. and Sharpe, G.R.
Publisher: Lippincott Williams & Wilkins
Date: 1 May 2020
ISSN: 0195-9131
Identifiers:
NumberType
10.1249/mss.0000000000002395DOI
1323838Other
Divisions: Schools > School of Science and Technology
Depositing User: Linda Sullivan
Date Added: 07 May 2020 11:32
Last Modified: 25 Jun 2020 14:16
URI: http://irep.ntu.ac.uk/id/eprint/39803

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