Assertion: central nervous system's activity | /r/HasProperty | maintained on life-long basis
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Source sentences:
text: The following activities, if maintained on a life-long basis, can help keep the nervous system operating at peak efficiency: eating a proper diet low in fat and high in fiber, maintaining a healthy weight, consuming proper amounts of good-quality drinking water, getting adequate rest, engaging in regular exercise, not smoking or taking illegal drugs, drinking only moderate amounts of alcohol (if at all), and reducing stress levels.