| http://www.w3.org/ns/prov#value | - For the middle-aged or older, high-intensity exercise has its perils. ???Somewhere around age 45 for men and 55 for women, you worry about the dark side of exercise,??? he said. ???Studies are clear that when people have catastrophes, such as heart attacks, they are almost always related to inappropriately high-intensity exercise.??? Sometimes high-intensity routines are just too uncomfortable to
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