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physical activity

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Feeding Your Immune System

Physical activity, a healthy diet, and eight hours of sleep—it’s the basic things health experts say can keep your immune system strong. “We do get different nutrition from different food sources, so keeping a varied diet, making sure we eat…

Immune Boosting Foods

From what you eat, how long you sleep, and how often you exercise—health experts say all can impact your immune system. “Getting adequate sleep, trying to minimize stress, and also not smoking and keeping alcohol consumption more moderate, all those…

View full lesson: http://ed.ted.com/lessons/what-is-a-calorie-emma-bryce We hear about calories all the time: How many calories are in this cookie? How many are burned by doing 100 jumping jacks, or long-distance running, or fidgeting? But what is a calorie, really? And how…