I know that the only way to get stronger is to lift until failure, does the same method apply to cardio, need to be able to run 2miles in 16min. (or closest to it) 1 month from today,now i can run 1mile in 8:30 and be spent afterward, is it safe to train until i puke or absolutely need to sit down, i know the mind gives out far before the body does,im planning on pushing myself pretty hard the next couple of weeks, any advise is appreciated.
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