If you're moderately exercising for 150 minutes a week, as the Centers for Disease Control and Prevention recommends, or less than that, you're probably not an extreme athlete.
Yet according to the Centers for Disease Control an Prevention, Average height—5'9" for men, 5'4"for women—hasn't really changed since 1960.
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美国疾病控制与预防中心
美国疾病控制与预防中心(Centers for Disease Control and Prevention,CDC)是美国卫生及公共服务部所属的一个机构,总部设在乔治亚州亚特兰大。作为美国的政府机构,为保护公众健康和安全提供可靠的资料,通过与国家卫生部门及其他组织的有力的伙伴关系,以增进健康的决策,促进公民健康。该中心的重点在于发展和应用疾病预防和控制、环境卫生、职业健康、促进健康、预防及教育活动,旨在提高人民的健康。