Respiratory and leg muscles perceived exertion during exercise at altitude
| Autor: | L Biasco, Luca Pomidori, L. Cavalleri, Josuel Ora, Pasquale P. Pompilio, A. Lo Mauro, Marco Quaranta, Raffaele Dellaca, Bengt Kayser, Andrea Aliverti, Annaluisa Cogo, Riccardo Pellegrino, Giuseppe Miserocchi |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Pulmonary and Respiratory Medicine
Adult Male medicine.medical_specialty Respiratory rate Physiology Physical Exertion/physiology Physical Exertion Physical exercise Dyspnea Hypoxia Respiratory muscles Work of breathing ddc:616.9802 Internal medicine Exercise/physiology/psychology Respiratory muscle medicine Humans Exercise physiology Respiratory system Muscle Skeletal Exercise Tidal volume Aged Leg/physiology Leg Pulmonary Ventilation/physiology Muscle Skeletal/metabolism business.industry General Neuroscience Altitude Respiratory Mechanics/physiology Anatomy Middle Aged eye diseases Respiratory Function Tests Respiratory Mechanics Cardiology Breathing Exercise Test Perception sense organs Pulmonary Ventilation business |
| Zdroj: | Respiratory Physiology & Neurobiology, Vol. 177, No 2 (2011) pp. 162-8 |
| ISSN: | 1569-9048 |
| Popis: | We compared the rate of perceived exertion for respiratory (RPE,resp) and leg (RPE,legs) muscles, using a 10-point Borg scale, to their specific power outputs in 10 healthy male subjects during incremental cycle exercise at sea level (SL) and high altitude (HA, 4559 m). Respiratory power output was calculated from breath-by-breath esophageal pressure and chest wall volume changes. At HA ventilation was increased at any leg power output by ∼ 54%. However, for any given ventilation, breathing pattern was unchanged in terms of tidal volume, respiratory rate and operational volumes of the different chest wall compartments. RPE,resp scaled uniquely with total respiratory power output, irrespectively of SL or HA, while RPE,legs for any leg power output was exacerbated at HA. With increasing respective power outputs, the rate of change of RPE,resp exponentially decreased, while that of RPE,legs increased. We conclude that RPE,resp uniquely relates to respiratory power output, while RPE,legs varies depending on muscle metabolic conditions. |
| Databáze: | OpenAIRE |
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