问题2:运动强度应控制在最大心率的（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25667' and id < 2157225 and id<>'2157225' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25667' and id > 2157225 and id<>'2157225' order by id asc limit 5