Have you guys decided on an exercise or group of exercises yet? I think kez's approach about going balls to the wall for one set at the start of the day sounds like a very good idea.
I remember Rob saying to Andy a while ago as well something about doing reps every hour on the hour. I think it was in relation to improving his pushups for the army but I imagine you could apply the technique here as well with some success.
Still not sure the whole challenge is necessarily a great idea but I'm more than happy to be proven wrong.
Just to clarify, what is the specific goal of the challenge? Is it to improve your proficiency at the exercises? Imrove performance at Crossfit WOD's? Just to challenge yourself because, like most people that do Crossfit, you're all nutjobs who will never back down from a challenge?

