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Exercise, oxidative stress and hormesis.

Zsolt Radak1, Hae Y Chung, Erika Koltai

  • 1Institute of Sport Science, Faculty of Physical Education and Sport Science, Semmelweis University, Budapest, Hungary. radak@mail.hupe.hu

Ageing Research Reviews
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Summary
This summary is machine-generated.

Regular moderate exercise offers significant health benefits, improving cardiovascular function and reducing disease risk. Conversely, inactivity or excessive exercise can harm health, highlighting exercise

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Area of Science:

  • Exercise physiology
  • Health sciences
  • Biomedical sciences

Background:

  • Physical inactivity is linked to increased disease incidence, representing one end of the exercise hormesis curve.
  • Moderate exercise provides numerous health benefits, including improved cardiovascular function and potential neuroprotection against Alzheimer's disease.
  • Both physical inactivity and strenuous exercise can increase infection risk, while moderate activity boosts the immune system.

Purpose of the Study:

  • To explore the hormetic effects of physical activity on the human body.
  • To elucidate the mechanisms behind exercise-induced adaptations, including cardiovascular, neurological, and immunological benefits.
  • To differentiate the impacts of moderate exercise versus inactivity and overtraining on health outcomes.

Main Methods:

  • Review of existing literature on exercise physiology and hormesis.
  • Analysis of molecular and physiological adaptations to different exercise intensities and durations.
  • Examination of the relationship between exercise, oxidative stress, and immune function.

Main Results:

  • Moderate exercise improves cardiovascular function via nitric oxide pathways and may reduce Alzheimer's risk through neurotrophin enhancement and redox homeostasis modulation.
  • Mechanical stress from exercise leads to muscle hypertrophy and increased stress resistance.
  • Regular moderate exercise up-regulates the immune system and decreases oxidative challenge, contrasting with the negative effects of inactivity and overtraining.

Conclusions:

  • Regular moderate physical activity confers systemic benefits, enhancing physiological function and quality of life.
  • Exercise exhibits hormetic properties, where moderate levels are beneficial, but extremes (inactivity or overtraining) are detrimental.
  • Understanding exercise-induced hormesis is crucial for optimizing physical activity for disease prevention and overall health.