Well, what do I say.... I did it!!! Laura is right when during the podcast she states that you recover quicker. The first 5 mins my calves tightened up and by the 2nd run they had calmed down and on the last 5 mins, I was going well, so the last minute upped my pace. Not too bad after having two injections at the dentist this morning, only now has the numbness worn off!