You don't have to exercise for long periods of time - or even vigorously‚ - o become fit. You do need to aim for at least 30 minutes of moderate activity most days of the week.
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Smoking damages your arteries, and it’s thought that the damaged arteries in the discs and joints in your back may lead to pain and injury.
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Most children rely on backpacks to carry books and supplies to and from school and activities. But a backpack that's too heavy or doesn't fit right can cause harm.
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