Bodybuilders have been known to carb cycle during a diet, increasing carbohydrate intake on certain days to trick their metabolism into not slowing down so much from caloric restriction. Endurance athletes like to load up on carbs before long distance race events, and a study published in the Journal of the American College of Cardiology (JACC) suggests going overboard with carb loading might be hard on your heart.
Researchers from Vanderbilt and the University of Alabama Birmingham gave 33 subjects a 264 calorie carbohydrate shake. This high-carb load suppressed the heart’s production of a hormone called ANP by 25% over several hours. Because ANP helps rid your body of excess salt and reduces blood pressure, restricting this process can contribute to salt retention and hypertension.
Cutting down for summer or a physique contest is one thing. Researchers from the Leibniz Institute on Aging – Fritz Lipmann Institute in Jena, Germany found that cutting calories long-term can have both positive and negative consequences, as a study published in the Journal of Experimental Medicinesuggests.
A few years back, scientists were able to extend the lifespans of worms, fruit flies and lab rats through caloric restriction. Sometimes they lived 50% longer than normal. More recently, tests on mice showed that 30% food restriction slowed the aging of stem cells while reducing production of blood cell lymphocytes used for immune defense up to 75%
People trying to shed a few pounds will take the stairs instead of the elevator, and that ups the daily amount of calories burned. A study published in the Journal of Applied Physiology suggests the amount is probably more than two generally accepted calculations estimate.
Researchers from Southern Methodist University developed a new way to estimate the energy expenditure of walking that takes into account body weight, walking uphill and walking while carrying a load. Compared to the 40+ year old formulas, which tended to under estimate energy expenditure, this new method more accurately predicts calories burned for 97% of subjects.
Puma’s Hannibal Race at the US Embassy in Lebanon.
Organized by Threshold & Tactical Fitness and Sponsored by First Nutrition