I ran for over 44 minutes on my dreadmill. (Couldnt face the wind and rain tonight). Not very fast: mine is small so if I stretch my legs, I run off the end or over the side. But the point was I was neither out of breath nor tired. This is the longest I've run since beginning c25k and the furthest. I was determined not to keep looking at the elapsed time till I began to tire...but that happened after 44 minutes, I just hadn't realised how long I had been running, and to be honest I could have kept going. It's amazing how much I have in reserve when I'm not slogging up and down hill.