Medical exams can record changes in health over time, they can help people live longer lives, they can prevent existing issues from getting worse, and finally it is required for employment.
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I say it's A. But I'm not 100% positive, so sorry if my answer isn't helpful.
Warming up prevents injuries by loosening your joints, and improving blood flow to your muscles — making your muscles less likely to rip, tear, or twist in a harmful way during your workout. Stretching also helps prepare your muscles for the physical activities you're about to perform.
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