Ventilation and perceived exertion are sensitive to changes in exercise tolerance: arm+leg cycling vs. leg cycling

Frontiers in Physiology

Physiology

Andrea Nicolò¹  Ilenia Bazzucchi¹  Francesco Felici¹  Massimo Sacchetti¹  Michele Girardi² 

[1] Laboratory of Exercise Physiology, Department of Movement, Human and Health Sciences, University of Rome “Foro Italico”, Rome, Italy;Laboratory of Exercise Physiology, Department of Movement, Human and Health Sciences, University of Rome “Foro Italico”, Rome, Italy;Division of Respiratory and Critical Care Physiology and Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Institute of Respiratory Medicine and Exercise Physiology, Torrance, CA, United States;

关键词: endurance performance;    breathing control;    respiratory frequency;    incremental test;    time to exhaustion;    fatigue;    breathing pattern;    oxygen uptake;   

DOI  :  10.3389/fphys.2023.1226421

 received in 2023-05-21, accepted in 2023-07-20,  发布年份 2023

来源: Frontiers

【 摘 要 】

Purpose: Growing evidence suggests that respiratory frequency (fR) is a marker of physical effort and a variable sensitive to changes in exercise tolerance. The comparison between arm+leg cycling (Arm+leg) and leg cycling (Leg) has the potential to further test this notion because a greater exercise tolerance is expected in the Arm+leg modality. We systematically compared Arm+leg vs. Leg using different performance tests.Methods: Twelve males underwent six performance tests in separate, randomized visits. Three tests were performed in each of the two exercise modalities, i.e. an incremental test and two time-to-exhaustion (TTE) tests performed at 90% or 75% of the peak power output reached in the Leg incremental test (PPOLeg). Exercise tolerance, perceived exertion, and cardiorespiratory variables were recorded during all the tests.Results: A greater exercise tolerance (p < 0.001) was found for Arm+leg in the incremental test (337 ± 32 W vs. 292 ± 28 W), in the TTE test at 90% of PPOLeg (638 ± 154 s vs. 307 ± 67 s), and in the TTE test at 75% of PPOLeg (1,675 ± 525 s vs. 880 ± 363 s). Unlike V˙O2 and heart rate, both fR and minute ventilation were lower (p < 0.003) at isotime in all the Arm+leg tests vs. Leg tests. Furthermore, a lower perceived exertion was observed in the Arm+leg tests, especially during the TTE tests (p < 0.001).Conclusion: Minute ventilation, fR and perceived exertion are sensitive to the improvements in exercise tolerance observed when comparing Arm+leg vs. Leg, unlike V˙O2 and heart rate.

【 授权许可】

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Copyright © 2023 Nicolò, Girardi, Bazzucchi, Sacchetti and Felici.