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Related Experiment Video

Updated: Mar 2, 2026

Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
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Physiological Redundancy and the Integrative Responses to Exercise.

Michael J Joyner1, Jerome A Dempsey2

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Physiological redundancy helps the body maintain balance during intense exercise and adapt to training. Understanding this concept is key to grasping exercise responses and their health benefits.

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Area of Science:

  • Exercise Physiology
  • Systems Biology
  • Homeostasis

Background:

  • Biological systems exhibit significant physiological redundancy across molecular, cellular, organ-system, and whole-body levels.
  • This redundancy is crucial for maintaining homeostasis during acute exercise, which can increase metabolic rate tenfold or more.
  • Trade-offs can exist between optimizing individual organ/system performance and overall whole-body performance during exercise.

Purpose of the Study:

  • To elucidate the role of physiological redundancy in acute and chronic exercise responses.
  • To highlight the importance of physiological redundancy in exercise adaptation and health benefits.
  • To provide a framework for understanding exercise physiology at multiple integration levels.

Main Methods:

  • Conceptual analysis of physiological redundancy in exercise.
  • Review of molecular, cellular, and systemic responses to exercise.
  • Integration of data across different scales of biological organization.

Main Results:

  • Physiological redundancy protects whole-body homeostasis during acute exercise.
  • Redundancy influences adaptive responses to exercise training and habitual physical activity.
  • Understanding redundancy is critical for interpreting physiological responses to exercise.

Conclusions:

  • Physiological redundancy is a fundamental principle governing exercise responses.
  • It plays a vital role in both immediate physiological adjustments and long-term adaptations to exercise.
  • Appreciating redundancy enhances the understanding of exercise's impact on health.