Perceived mental strain dissociates from perceived physical strain during relative intensity submaximal exercise on ascent from low to high altitude
| Autor: | Trevor A. Day, Jeroen Swart, Patrick J. Drouin, Michael E. Tschakovsky, Jeremy J. Walsh |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Male
medicine.medical_specialty Physiology Partial Pressure Physical Exertion Strain (injury) submaximal exercise Work rate Affect (psychology) Young Adult 03 medical and health sciences 0302 clinical medicine Altitude Physical medicine and rehabilitation Heart Rate Mental strain Physiology (medical) medicine Humans QP1-981 Exercise Core (anatomy) business.industry perceived physical strain Original Articles 030229 sport sciences Carbon Dioxide Effects of high altitude on humans Mental Fatigue medicine.disease Oxygen Exercise intensity perceived mental strain Original Article Female Perception business human activities 030217 neurology & neurosurgery altitude |
| Zdroj: | Physiological Reports, Vol 9, Iss 13, Pp n/a-n/a (2021) Physiological Reports |
| Popis: | Perceived fatigability, which has perception of physical strain and of mental strain as its components, can impact exercise tolerance. Upon ascent to high altitude, low landers experience reduced exercise capacity and reduced tolerance for a given absolute submaximal work rate. It is established that perceived physical strain tracks with relative exercise intensity. However, it is not known how altitude ascent affects perceived mental strain relative to perceived physical strain. We tested the hypothesis that when exercising at the same relative exercise intensity perceived physical strain will remain unchanged whereas perceived mental strain will decrease on ascent from low to high altitude in the Everest region in Nepal. Twelve hours after arriving at each of three elevations; 1400 m, 3440 m, and 4240 m, 12 untrained participants used the task effort awareness (TEA) and physical‐rating of perceived exertion (P‐RPE) scales to report perceived mental and physical strain during a 20 min walking test at a self‐monitored heart rate reserve (HRR) range of 40–60% (Polar HR Monitor). TEA and P‐RPE were recorded twice during exercise (5–7 min and 14–16 min). Neither P‐RPE (1400 m: 11.1 ± 1.8, 3440 m: 10.7 ± 1.2, 4240 m: 11.5 ± 1.5) nor %HRR (1400 m: 55.25 ± 7.34, 3440 m: 51.70 ± 6.70, 4240 m: 50.17 ± 4.02) changed as altitude increased. TEA decreased at 4240 m (2.05 ± 0.71) compared to 1400 m (3.44 ± 0.84)––this change was not correlated with any change in %HRR nor was it due to a change in core affect. These findings support our hypothesis and demonstrate the independence of perceived physical and perceived mental strain components of perceived fatigability. Implications for exercise tolerance remain to be determined. Until now, no work had examined the domain of perceived mental strain upon ascent from low to high altitude. We tested and confirmed the hypothesis that at the same relative submaximal exercise intensity, participants would perceive the same amount of physical strain but less mental strain upon ascent from low to high altitude. Therefore, perceived mental strain dissociates from perceived physical strain upon ascent from low to high altitude—the mechanism(s) responsible for this dissociation remain to be determined. |
| Databáze: | OpenAIRE |
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