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New review shows plant-based diets benefit athletes' heart health, endurance, recovery

January 10, 2019

WASHINGTON--Meat-free athletes--from tennis champion Venus Williams to Formula 1's Lewis Hamilton to Derrick Morgan of the NFL's Tennessee Titans--have already proven the performance-boosting power of a plant-based diet. Now, "Plant-Based Diets for Cardiovascular Safety and Performance in Endurance Sports," a new scientific review published in the journal Nutrients adds further evidence that plant-based athletes benefit from improvements in heart health, performance, and recovery.

"It's no wonder that more and more athletes are racing to a vegan diet," says review co-author James Loomis, M.D., M.B.A., medical director for the Barnard Medical Center. "Whether you're training for a couch-to-5K or an Ironman Triathlon, a plant-based diet is a powerful tool for improving athletic performance and recovery." Dr. Loomis, who is currently training for an Ironman Triathlon, is also featured in The Game Changer, a documentary on vegan athletes scheduled to be released in 2019. He also served as team internist for the St. Louis Rams and the St. Louis Cardinals.

Plant-based diets play a key role in cardiovascular health, which is critical for endurance athletes. But the review finds that even well-trained athletes are at risk for heart disease. A 2017 study found that 44 percent of middle-aged and older endurance cyclists or runners had coronary plaques. A low-fat, vegetarian diet is the most effective dietary pattern clinically shown to reverse plaque. A plant-based diet also addresses other key contributors to atherosclerosis, including dyslipidemia, elevated blood pressure, elevated body weight, and diabetes.

Because a plant-based diet is typically high in carbohydrates, it may also offer performance advantages. Carbohydrates are the primary energy source during aerobic exercise, and endurance is enhanced by a high-carbohydrate intake. But a 2016 study of Ironman triathletes found that fewer than half reported meeting the recommended carbohydrate intake for athletes training 1-3 hours per day.

The researchers also find that a plant-based diet boosts athletic performance and recovery by increasing blood flow and tissue oxygenation and reducing oxidative stress and inflammation. A varied diet of fruits, vegetables, grains, and legumes, along with a vitamin B12 supplement, provides all of the necessary nutrients an endurance athlete needs, including protein, calcium, and iron.

"Like any endurance athlete, plant-based athletes just need more calories than less active people," says review co-author Susan Levin, M.S., R.D., C.S.S.D., a board certified specialist in sports dietetics and director of nutrition education for the Physicians Committee for Responsible Medicine. "And if they are eating a wide variety of nutrient-dense fruits, vegetables, grains, and beans, they will easily meet all of their nutritional needs."
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For an interview with Dr. Loomis or Ms. Levin, please contact Michael Keevican at 202-527-7367 or mkeevican@pcrm.org.

Physicians Committee for Responsible Medicine

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