Antioxidants and Exercise Performance: With a Focus on Vitamin E and C Supplementation

Area of Science:

• Exercise Physiology
• Nutritional Biochemistry

Background:

• Exercise increases oxidative stress, producing free radicals that can cause muscle damage and fatigue.
• Free radicals, while detrimental to performance, may also signal protective adaptations to physical stress.

Purpose of the Study:

• To evaluate the efficacy of antioxidant supplementation (Vitamins E and C) on athletic performance and training adaptations.
• To investigate the impact of antioxidant supplements on muscle mass, strength, and anabolic signaling pathways.

Main Methods:

• Review of current scientific literature on antioxidant supplementation in athletes.
• Analysis of studies examining the effects of Vitamin E and C on exercise-induced oxidative stress and performance outcomes.

Main Results:

• Antioxidant supplementation may blunt beneficial exercise adaptations by interfering with signaling pathways.
• Evidence for Vitamin E and C improving performance is inconsistent, with potential negative impacts on resistance training adaptations.
• Supplementation is generally not beneficial except for specific cases like altitude training.

Conclusions:

• Athletes should exercise caution with antioxidant supplements (Vitamins E and C) as they may impair training adaptations.
• A balanced diet rich in fruits and vegetables is recommended to meet vitamin and antioxidant needs.
• Focusing on whole foods ensures intake of essential nutrients and bioactive compounds without blocking anabolic signaling.