Definition: "An ergogenic aid is any substance or phenomenon that enhances performance "
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17.05.2011 |
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Calorie burning reduces mortality in elderly
The more energy people in their seventies expend on physical activities, the less likely they are to die. According to a study done by the American National Institute on Aging, elderly people who burn high amounts of calories because they take daily exercise are twice less likely to die than elderly people who do not burn many calories.
Exercise & life span
The protective mechanism that movement provides works in a complex way. Movement reduces the chance of dying from chronic diseases such as diabetes-2, cancer and heart and vascular disease. A partial explanation of the positive effect of movement is that it stimulates the activity of more detoxifying enzymes. A recent theory suggests that developed muscle mass results in considerable emissions of anti-inflammatory and life-extending signal substances. That's why muscular strength is believed to protect against cancer and why strong men are thought to live longer.
Study
Results
The table above shows that, for every 287 calories that the septuagenarians expended on physical activity, their chance of dying declined by 30 percent. The researchers corrected their figures for every variable they could think of: "age, sex, race, weight, height, percentage of body fat, sleep duration, self-rated health, education, smoking status and history, cardiovascular disease, lung disease, diabetes, hip or knee osteoarthritis, osteoporosis, cancer, and depression."
Conclusion
It's possible that the figures underestimate the life-extending effect of physical exercise. It was not by doing sport or walking that the active subjects burned more calories, but by doing paid work. Apparently the septuagenarians burned more calories at work than during their free time.
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