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Arteries of Vegans vs. Runners

December 23, 2013
By AFPA Fitness

Arteries of Vegans vs. Runners

The carotid arteries of those eating plant-based diets appear healthier than even those just as slim (long-distance endurance athletes who’ve run an average of 50,000 miles).

Switching to a plant-based diet can reverse heart disease, open up arteries in some cases without drugs, without surgery, but because our first symptom of heart disease may be your last— sudden cardiac death—it’s best not to wait until atherosclerosis progresses that far.

To predict the risk of dying from a heart attack, sure we can measure risk factors such as cholesterol levels and blood pressure, but wouldn’t it be nice to actually see what’s going on inside our arteries before it’s too late? Well our imaging technologies are so good that we can now, but the required dose of radiation delivered to your chest is so high that a young women getting just a single scan, for example, may increase her lifetime risk of breast cancer and lung cancer by between around 1 and 4%.

Our carotid arteries, though, which connect our heart to our brain, come close enough to the surface in our necks that we visualize the arterial wall using harmless sound waves with ultrasound. OK, so how do the arteries of those eating plant-based diets compare to those eating the standard American diet before there’s any problem? Researchers found some vegans and found out.

Here’s the standard American diet group. This is the thickness of the inner wall of their carotid arteries where the atherosclerotic plaque builds up, considered a predictor of all cause and cardiovascular mortality. That same inner layer was significantly slimmer in vegans, but so were the vegans themselves! Those eating the standard American diet were, on average, overweight with a BMI over 26 while the vegans were a trim 21—that’s 36 pounds lighter.

So maybe the only reason those eating meat, eggs, and dairy had thickened arterial walls was because they were overweight, maybe the diet per se had nothing to do with it. To solve the riddle one would have to find a group still eating the standard American diet but as slim as a vegan. To find a group that fit and trim, they had to use long-distance endurance athletes, who ate the same crappy American diet— but ran an average of 48 miles per week for 21 years. You run almost two marathons a week for 20 years you can be as slim as a vegan—no matter what you eat. So where do they fall on the graph? Both the vegans and the conventional diet group were sedentary—less than an hour of exercise a week.

The endurance runners were here. So it appears if you run an average of about a thousand miles every year you can rival some couch potato vegans. Doesn’t mean you can’t do both, but it may be easier to just eat plants.

Sources Cited

http://nutritionfacts.org/video/arteries-of-vegans-vs-runners/

A. Sarma, M. E. Heilbrun, K. E. Conner, S. M. Stevens, S. C. Woller, C. G. Elliott. Radiation and chest CT scan examinations: What do we know? Chest 2012 142(3):750 – 760.

L. Fontana, T. E. Meyer, S. Klein, J. O. Holloszy. Long-term low-calorie low-protein vegan diet and endurance exercise are associated with low cardiometabolic risk. Rejuvenation Res. 2007 10(2):225 – 234.

S.-Y. Yang, X.-J. Li, W. Zhang, C.-Q. Liu, H.-J. Zhang, J.-R. Lin, B. Yan, Y.-X. Yu, X.-L. Shi, C.-D. Li, W.-H. Li. Chinese lacto-vegetarian diet exerts favorable effects on metabolic parameters, intima-media thickness, and cardiovascular risks in healthy men. Nutr Clin Pract. 2012 27(3):392 – 398.

T.-C. Su, P.-L. Torng, J.-S. Jeng, M.-F. Chen, C.-S. Liau. Arterial function of carotid and brachial arteries in postmenopausal vegetarians. Vasc Health Risk Manag 2011 7:517 – 523.

T.-C. Su, J.-S. Jeng, Jung-Der Wang, P.-L. Torng, S.-J. Chang, C.-F. Chen, C.-S. Liau. Homocysteine, circulating vascular cell adhesion molecule and carotid atherosclerosis in postmenopausal vegetarian women and omnivores. Atherosclerosis 2006 184(2):356 – 362.

A. D. Smith, H. Refsum. Do we need to reconsider the desirable blood level of vitamin B12? J. Intern. Med. 2012 271(2):179 – 182.

L. M. Hurwitz, R. E. Reiman, T. T. Yoshizumi, P. C. Goodman, G. Toncheva, G. Nguyen, C. Lowry. Radiation dose from contemporary cardiothoracic multidetector CT protocols with an anthropomorphic female phantom: Implications for cancer induction. Radiology 2007 245(3):742 – 750.

T. Kwok, P. Chook, L. Tam, M. Qiao, J. L. F. Woo, D. S. Celermajer, K. S. Woo. Vascular dysfunction in Chinese vegetarians: An apparent paradox? J. Am. Coll. Cardiol. 2005 46(10):1957 – 1958.

T. Kwok, P. Chook, M. Qiao, L. Tam, Y. K. P. Poon, A. T. Ahuja, J. Woo, D. S. Celermajer, K. S. Woo. Vitamin B-12 supplementation improves arterial function in vegetarians with subnormal vitamin B-12 status. J Nutr Health Aging 2012 16(6):569 – 573.

E. Mądry, A. Lisowska, P. Grebowiec, J. Walkowiak. The impact of vegan diet on B-12 status in healthy omnivores: Five-year prospective study. Acta Sci Pol Technol Aliment 2012 11(2):209 – 212.

S. Murakami, K. Otsuka, N. Hotta, G. Yamanaka, Y. Kubo, O. Matsuoka, T. Yamanaka, M. Shinagawa, S. Nunoda, Y. Nishimura, K. Shibata, E. Takasugi, M. Nishinaga, M. Ishine, T. Wada, K. Okumiya, K. Matsubayashi, S. Yano, K. Ichihara, G. Cornélissen, F. Halberg. Common carotid intima-media thickness is predictive of all-cause and cardiovascular mortality in elderly community-dwelling people: Longitudinal Investigation for the Longevity and Aging in Hokkaido County (LILAC) study. Biomed. Pharmacother. 2005 59(Suppl 1):S49 – 553.

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