如此锻炼几次或是更久，然后增加到跑2：30，步行时间为30秒。

Do this a few times or more, then increase to running 2:30, walking 30 seconds to a minute.

youdao

如此锻炼几次或是更久，然后增加到跑2：30，步行时间为30秒。

Do this a few times or more, then increase to running 2:30, walking 30 seconds to a minute.

youdao