肥肥跑步求解，这两种方式就说减脂的话哪种更好啊。

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第一种是昨天跑的，按大家的意见增加了步频，不过没降速，但是跑一阵子就没劲了得走一小会。心率比较高第二种是特意慢慢跑的，不用走全程都是慢慢的，而且心率也不高。但是第二种跑完没有第一种累啊，我感觉我还能跑。不过得看小象的预选了，就回家了。哪种减肥更好呢？