Thursday, January 1, 2015

New Year New You Tour Stops & How High Intensity Exercise Suppresses Appetite!

It can be so discouraging trying to get your weight under control if you don't have the scientific knowledge on how your body actually works.This  fabulous weekly Essentials of Health Bulletin courtesy of Usana Health Sciences sheds light on how High Intensity Exercise helps your body regulate eating and food selection. Yes! By now you may have heard that the RESET Challenge launches Monday January 5, 2015 running right through to March 29th , 2015. In support of that the New Year New You Tour with Dr. Brian Dixon and colleagues is making a nation wide tour beginning in New York Sunday, January 10h and it is free. To lean more go here! Dates and Times and Languages posted! El Habla Espanol!

To Your Health Goals!

- Ekayani

December 31, 2014

High-intensity exercise may influence appetite regulation and food selection

At a Glance

Increased physical activity is associated with long-term successful weight maintenance due to mechanisms more complex than just increased energy expenditure. A study using MRI imaging has shown that intense exercise not only affects energy output, but may also influence how people respond to food.
Read more about this research below.

 Short periods of intense exercise are known to suppress hunger through appetite regulating hormones. A study published in the American Journal of Clinical Nutrition compared the effects of high-intensity exercise on central (brain) response to visual food stimuli. 

The researchers recruited 15 healthy lean men in their early twenties. The study participants completed two 60 minute tests: exercise (running at 70% maximum aerobic capacity) and a resting control. After each test, images of high- and low- calorie foods were viewed and the brain response to the foods was measured using an MRI.     

After the exercise session, thirst and core body temperature were increased while appetite response was significantly suppressed. Exercise significantly suppressed ghrelin (an appetite stimulating hormone) and enhanced the release of peptide YY (an appetite reducing hormone). When compared to the resting control, neural (brain) response in the brain’s reward related regions were stimulated in response to viewing the images of low-calorie foods, but suppressed upon viewing images of high-calorie foods. 

This study found that high intensity exercise increases neural responses in reward-related regions of the brain in response to images of low-calorie foods, and suppresses activation during the viewing of high-calorie foods. These central responses are associated with exercise-induced changes in peripheral signals related to hydration and appetite-regulation.

Exercise is a well-known important component of a healthy lifestyle. This study provides further evidence that exercise can do more than just providing a caloric deficit, it may also influence you to make healthier food choices.  

Crabtree DR, et al. The effects of high-intensity exercise on neural responses to images of food. Am J Clin Nutr. 2014 Feb;99(2):258-67. doi: 10.3945/ajcn.113.071381. Epub 2013 Dec 4.
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