Michael Greger: Friday Favorites: Improving VO2 Max – A Look at Vegetarian and Vegan Athletes

Key Takeaways

• Adopt a plant-based diet to potentially improve VO2 max and endurance performance, as vegan athletes showed 25% longer cycling endurance and superior aerobic capacity.
• Prioritize carbohydrate intake for endurance, as higher carb consumption (common in plant-based diets) may enhance muscle glycogen storage and performance.
• Combine plant-based eating with aerobic exercise for greater fitness gains—diabetics on vegetarian diets saw 12% VO2 max improvement vs. no change in non-vegetarians.
• Leverage metabolic benefits of plant-based diets, including better insulin sensitivity, fat loss (especially visceral fat), and glycemic control—even at the same calorie intake.
• Monitor psychological benefits like reduced hunger and improved mood, which may make calorie restriction and exercise adherence easier on plant-based diets.

Notable Quotes

“The results indicated that more plant-based diets led more effectively to improvement in physical fitness than less plant-based diets after the same aerobic exercise program.”

“Same calories, yet more loss of body fat… and most importantly, significantly more visceral fat loss, the most metabolically dangerous deep belly fat.”

Bottom Line

Switch to a plant-based diet to enhance aerobic fitness, endurance, and body composition—especially when combined with exercise—while gaining metabolic and psychological advantages.

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