Why we should exercise — and why we avoid it (The Buffalo News)

You already know that exercise is good for you. What you may not know is just how good — or exactly what qualifies as exercise. The notion that physical activity helps keep us healthy is very old news indeed. Hippocrates wrote about the dangers of too little activity (and too much food). Tai chi, an exercise system of graceful movements that originated in China, dates from the 12th century B. …
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