Im trying to get into working out never been big on weights though just like doing push up pulls up dips you know shyt like that.I heard that there's no weights in insanity and you can get fit just by stuff like that but i also heard that that shyt was serious and its a hard work out. I was wondering should i start a lil running and getting my wind up before doing it or would it be ok to just jump right into it. Not really trying to gain muscle mass just trying to get in shape.