Oxidative stress : relationship with exercise and training

Area of Science:

• Biochemistry and Physiology
• Exercise Science

Background:

• Free radicals are reactive molecules with dual roles in biological systems.
• An imbalance between free radical production and antioxidant defenses causes oxidative stress.
• Oxidative stress is implicated in aging, disease (e.g., cancer, Parkinson's), and muscular fatigue.

Purpose of the Study:

• To review the role of free radicals and the antioxidant system in the human body.
• To explore the relationship between physical exercise, oxidative stress, and training adaptations.
• To understand the implications of oxidative stress in fatigue and overtraining.

Main Methods:

• Literature review of scientific articles on free radicals, oxidative stress, and exercise.
• Synthesis of information on the body's antioxidant defense mechanisms.
• Analysis of the impact of physical training on oxidative stress markers.

Main Results:

• The antioxidant system, comprising enzymatic and non-enzymatic components, protects against free radical damage.
• Physical exercise can modulate oxidative stress, with effects varying based on training parameters.
• Oxidative stress is a contributing factor to muscular fatigue and potentially overtraining.

Conclusions:

• Maintaining a balance between free radicals and antioxidant defenses is crucial for health.
• Exercise-induced oxidative stress requires careful management through appropriate training strategies.
• Further research into oxidative stress mechanisms can inform strategies for preventing fatigue and overtraining.