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Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

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Using Near-Infrared Spectroscopy Wearable Devices to Identify Central Versus Peripheral Limitations During Exercise
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Physiological responses to exercise at altitude : an update.

Robert S Mazzeo1

  • 1Department of Integrative Physiology, University of Colorado, Boulder, Colorado 80309, USA. mazzeo@colorado.edu

Sports Medicine (Auckland, N.Z.)
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PubMed
Summary

High-altitude exposure triggers physiological and metabolic changes, impacting heart rate, blood flow, and energy use. Understanding these adaptations is key for athletes using altitude training to enhance performance.

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Supramaximal Intensity Hypoxic Exercise and Vascular Function Assessment in Mice
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Supramaximal Intensity Hypoxic Exercise and Vascular Function Assessment in Mice

Published on: March 15, 2019

Area of Science:

  • Physiology
  • Environmental Medicine
  • Exercise Science

Background:

  • Recent research has illuminated physiological and metabolic adjustments to high-altitude exposure.
  • Key variables studied include heart rate, stroke volume, cardiac output, muscle blood flow, substrate utilization, and mitochondrial function.
  • The 'lactate paradox' at high altitude remains an area of significant research interest.

Purpose of the Study:

  • To investigate the physiological and metabolic adaptations to short- and long-term high-altitude exposure.
  • To explore the mechanisms behind observed alterations in cardiovascular and metabolic functions.
  • To understand the role of the sympathoadrenal response in high-altitude acclimatization.

Main Methods:

  • Review of studies examining physiological and metabolic responses at rest and during exercise.
  • Analysis of factors influencing acclimatization, including hypoxia degree, exposure duration, and exercise intensity.
  • Examination of inter-individual variability in adaptation to hypoxic environments.

Main Results:

  • High-altitude exposure induces significant physiological and metabolic adjustments.
  • A robust sympathoadrenal response is elicited, contributing to critical adaptations.
  • Altitude acclimatization influences substrate utilization and mitochondrial function.

Conclusions:

  • High-altitude exposure is a significant environmental stressor with profound physiological effects.
  • Understanding these adaptations is crucial for optimizing training strategies, such as 'live high-train low' for endurance athletes.
  • Individual variability in response to hypoxia necessitates personalized approaches to altitude exposure and training.