- the heart, blood vessels, and the autonomic nervous system, which controls the various systems in the body, the adjustment of both the temperature and the work
- protect the heart. Which may lack blood immediately if start exercising hard from the beginning!] prevent faint down unconsciously due to blood flow to the brain is not enough. If you start to exercise hard from the start!- reduce the chance of injury of joints. Ligaments and muscles due to adaptation in continuous use, from light to heavy
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