Search results for " Power–duration relationship"

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Exercise intolerance at high altitude (5050 m): critical power and W'.

2011

Abstract The relationship between work rate (WR) and its tolerable duration (tLIM) has not been investigated at high altitude (HA). At HA (5050 m) and at sea level (SL), six subjects therefore performed symptom-limited cycle-ergometry: an incremental test (IET) and three constant-WR tests (% of IET WRmax, HA and SL respectively: WR1 70 ± 8%, 74 ± 7%; WR2 86 ± 14%, 88 ± 10%; WR3 105 ± 13%, 104 ± 9%). The power asymptote (CP) and curvature constant (W′) of the hyperbolic WR–tLIM relationship were reduced at HA compared to SL (CP: 81 ± 21 vs. 123 ± 38 W; W′: 7.2 ± 2.9 vs. 13.1 ± 4.3 kJ). HA breathing reserve (estimated maximum voluntary ventilation minus end-exercise ventilation) was also comp…

AdultMalePulmonary and Respiratory MedicinePhysiologyOxygen pulsepower-duration relationshipPhysical exerciseExercise intoleranceAltitude SicknessSettore BIO/09 - FisiologiaAnimal scienceExercise toleranceOxygen pulsemedicineHumansMaximum voluntary ventilationHypoxiaMathematicsAltitudeGeneral NeuroscienceHypoxia Exercise tolerance Power–duration relationship Lactate Oxygen uptake Oxygen pulsehypoxia; exercise tolerance; power-duration relationship; lactate; oxygen uptake; oxygen pulseMiddle AgedEffects of high altitude on humansIncremental testOxygen uptakeCritical powerExercise TestPhysical EnduranceBreathingLactateFemalePower–duration relationshipmedicine.symptomPulmonary Ventilation
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