text: The bicycle crunch is THE single most effective ab exercise out there. I read this on a list that studied all ab excercises plus ab machines and such. Oh I found the link!! You should check this out! http://www.ginmiller.com/gmf04/artinfo/bestabsintro1.htm\nAnd for how to do the bicycle crunch if you don't know go here \nhttp://www.toneteen.com/exercises/abs_bicyclecrunch.htm\nI also recommend 8 Minute Abs! the excerise dvd. It only takes 8 minutes a day!