The balance of muscle oxygen supply and demand reveals critical metabolic rate and predicts time to exhaustion
Brett S. Kirby, David Clark, Eric M. Bradley, Brad W. Wilkins
Abstract
Dynamic muscle O 2 saturation discriminates boundaries between exercise intensity domains, exposes a critical metabolic rate as the highest rate of steady state O 2 supply and demand, describes time series depletion and repletion for work above critical power, and predicts time to exhaustion during severe domain whole body exercise. These results highlight the matching of O 2 supply and demand as a primary determinant for sustainable exercise intensities from those that are unsustainable and lead to exhaustion.
Topics & Concepts
Metabolic rateEconomicsWork (physics)Work rateInternal medicineHeart rateMedicineThermodynamicsBlood pressurePhysicsCardiovascular and exercise physiologySports Performance and TrainingHeart Rate Variability and Autonomic Control