Well, okay two more questions. First you know how some people say running just isn't for them, and for some people it's not. Too hard on the joints and so forth, anyway how long do you think people should give it before they decide it's not for them? Do you think most people pretty much know right away? Also, how long should a person be running before they add another day of running to their schedule? Right now I just run according to time, not counting miles just time and trying to stay steady for a while and then adding a little more time bit by bit. Thanks