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【单选题】
以健身为主要目的的体育锻炼,应当以有氧运动形式为主,强度不要过大,锻炼时间必须保证,美国疾病控制和预防中心(CDC)建议,可每天累积完成 分钟缓和的体育运动,以取得健康效果。
A.
10~15分钟
B.
20~40分钟
C.
30~60分钟
D.
60~90分钟
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