Friday Favorites: Comparing Vegetarian and Vegan Athletic Performance, Endurance, and Strength

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Although few studies have specifically examined how plant-based diets affect athletic performance, the existing research generally indicates no significant differences in endurance, strength, or overall performance between vegetarians/vegans and omnivores. While these diets do not appear to offer immediate advantages or disadvantages for exercise output, they play a crucial role in reducing the risk of chronic diseases, which is particularly important for athletes who may already suffer from higher rates of heart muscle damage compared to sedentary individuals. Consequently, while early intervention studies lasting only days or weeks often fail to show performance gaps because long-term dietary shifts are required to see effects, more robust data suggests that plant-based eating does not compromise physical capabilities and may even enhance specific areas of fitness over time. Recent updates to the scientific literature provide a clearer picture when comparing athletes who have adhered to their diets for years rather than just weeks. A study focusing on endurance athletes found that vegetarians, most of whom were vegans with at least two years of experience, demonstrated superior cardiorespiratory fitness compared to their meat-eating counterparts. This group exhibited a higher VO2 max, indicating greater maximal oxygen uptake and aerobic capacity during exhaustive treadmill tests, even though peak muscle strength remained similar across diet groups. Another 2020 study reinforced these findings by comparing vegans who had eaten plants for an average of four years against omnivores; despite the vegan group being older on average, they still showed significantly better aerobic performance, lasting approximately 25% longer during cycling tests to exhaustion even after controlling for VO2 max levels. The consensus emerging from this body of evidence is that a strictly plant-based diet is not detrimental to endurance or muscle strength and may actually facilitate better aerobic capacity in athletes contrary to popular belief. While short-term dietary changes might not immediately alter performance metrics, long-term adherence allows the favorable health impacts of plant-based nutrition to translate into tangible athletic benefits, such as improved recovery and sustained training intensity. Ultimately, the data suggests that while vegetarians and vegans perform comparably to omnivores in terms of raw power and strength, they often excel in endurance events due to enhanced cardiovascular efficiency, proving that a meat-free lifestyle can support high-level athletic achievement without sacrificing physical output.

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[music] >> Few studies have investigated the impact of a plant-based diet on athletic performance, but the majority of the studies that have been done show no differences in endurance, performance, or strength. So, while plant-based diets do not seem to provide advantages or disadvantages on exercise performance, what plant-based diets can do is reduce the risk of chronic disease, a point I made in my video why all athletes should eat plant-based diets, because surprisingly, endurance athletes may have more advanced atherosclerosis and more heart muscle damage compared with sedentary individuals, so it's even more important they eat healthy. But, due to the favorable impact on health, it could be assumed that performance would also be influenced by plant-based diets. Let's take a closer look at the available evidence. This is the most commonly cited review. Studies connecting vegetarian diets to improved health are well-established. However, the evidence for this phenomenon to be transferred to improve physical performance in athletes is less clear, finding no difference, at least acutely, between a vegetarian-based diet and an omnivorous diet in muscular power, muscular strength, short burst, or endurance performance. The intervention studies in this review, however, only lasted days or weeks. So, being a vegetarian for 4 days may not tip the balance, or even a few months. But, see, that's a considerable limitation. These are people who had been eating meats, you know, their whole lives, and subsequently adopt a vegetarian diet only for the duration of the study, rather than comparing participants who have adhered to a vegetarian or meat-containing diet long-term. This study compared exercise capacity of vegan, vegetarian, and meat-eating recreational runners, and found similar maximum power output among all three groups, suggesting there's no significant difference in maximum exercise capacity. Though, that's at the same training frequency, time, and distance. Perhaps plant-based diets might enhance recovery and allow such athletes to train longer and harder. A number of studies have come out since this review was published in 2016. What's the update? Well, this study compared the cardiorespiratory fitness and peak torque strength differences between vegetarian and omnivore endurance athletes. Most of the vegetarians were actually vegans and most for at least 2 years and results from this study indicate that vegetarian endurance athletes' cardiorespiratory fitness was greater than that for their omnivorous counterparts. They had greater VO2 max, meaning greater maximal oxygen uptake, a greater aerobic capacity as measured on a progressive graded maximal treadmill test to exhaustion. Though, peak torque, peak strength based on leg extensions didn't differ between diet groups. Bottom line, these data suggest that vegetarian diets do not compromise performance outcomes and may facilitate aerobic capacity in athletes. In this 2020 study, all the plant-based participants were eating vegan for an average of 4 years. So, they were essentially comparing those who ate meat for 21 years versus those who ate meat for 25 years. Uh but after 4 years eating plants, you might expect to see some sort of difference. Yet, no significant differences were noted for upper and lower body muscle strength like in the last new study. Both groups of athletes were comparable for total body weight, lean body mass. Though, age was significantly higher in vegans compared with omnivores, so that put them at a little disadvantage. Yet still, there it is again, significantly better aerobic capacity. Uh then they had them pedal until exhaustion and the vegan group lasted about 25% longer, uh 12 minutes as opposed to 9 minutes. Is that just because their aerobic capacity is so high? No, even after controlling for VO2 max levels, there was still a significant endurance advantage in the vegans. The researchers conclude that in the very least a strictly plant-based diet doesn't seem to be detrimental to endurance and muscle strength, and endurance may actually be better in vegans contrary to popular belief.