After a hard workout, what’s the first thing you think about? If you are like me, it’s what to put in your body to maximize recovery - specifically the macronutrients carbohydrates, protein and fat. 

Okay, good. We are on the right track. But have you ever thought about what micronutrients are in your macronutrients, specifically, the ones that contain antioxidants?

Did you also know that consuming some antioxidants immediately after exercise can actually impair your fitness gains?

Now that I have your attention, let’s dig a little deeper.

Exercise creates a temporary rise in oxidative stress, which is often viewed as something to “fight” with antioxidants. However, this response is not purely harmful as it is a critical signal that drives adaptation.

Consuming high doses of antioxidants immediately after exercise can interfere with this process and blunt some of the benefits of training.

During exercise, the body produces reactive oxygen species (ROS). While excessive ROS can be damaging, the levels generated during normal training act as important signaling molecules that can stimulate mitochondrial biogenesis, improve insulin sensitivity, enhance muscle repair and adaptation and trigger the body’s own internal antioxidant defense systems.

In simple terms, this “stress” is part of what makes you fitter.

This is where it gets interesting…large amounts of supplemental antioxidants, particularly vitamins C and E, can neutralize ROS too quickly, dampening the signals needed for adaptation.

In fact, research has shown that high-dose antioxidant supplementation post-exercise may reduce mitochondrial adaptations to endurance training, blunt improvements in insulin sensitivity and potentially limit strength and hypertrophy signaling. 

It is important to have the discussion of where these antioxidants come from. Whole food sources (berries, veggies, herbs) provide antioxidants in moderate amounts along with other beneficial compounds to help recovery and adaptation. In contrast, high-dose antioxidant supplements deliver a higher concentration of antioxidants that can overwhelm normal signaling pathways.

Of course context matters because there may be situations where higher antioxidant intake can be beneficial:

• During periods of extremely high training loads
• In competition phases where recovery is prioritized over adaptation
• In individuals with low antioxidant status or high oxidative stress

Even then, timing and dosage matter. It is best to work with a nutrition professional, such as one of the eNRG Performance Sports Dietitians, to help you create a custom plan to meet your health and performance goals.

Remember, don’t rush to take a high-dose antioxidant supplement immediately after training. Be sure to look at any recovery product you consume to ensure there are not super high doses of antioxidants. And, focus on whole-food recovery first so your body can go through its natural adaptive processes.

Post-exercise oxidative stress is not something to eliminate, it’s something toleverage. High doses of antioxidants right after training can short-circuit the very signals that drive improvement.

The goal isn’t to suppress stress completely, but to apply the right amount at the right time so the body can adapt, rebuild and ultimately perform at a higher level.