@Km6464: I agree, it's not a waste if I have to start over. Id still be better for the time and effort already put in, but it would mean, I'd be that many more days behind my goal…the mental aspect of this challenge is to prove to yourself, you can achieve your goal despite obstacles that come up. In one of the articles I read about the guy who came up with the whole concept, he talks about why one workout has to be outside. It's supposed to push you, that conditions may not be optimal, and some times we have to "run in the ran".
There is no shame is stopping and taking a break if my body needed it, but also, I know my body is capable of a lot more than I allow myself to think it is. I don't have any heart conditions or blood pressure issues or any health issues that would prevent me from being able to get up and move around an hour and a half a day. What has stopped me in the past is myself….excuses, sinuses, work, I'm sleepy, it's hot out, it's too cold….blah, blah, blah….if I don't allow myself an excuse and it just come down to am I physically capable of achieving my goal today, then as long as I'm able I CAN do it! We all can!