I'm not entirely sure what I've got myself into...

At my gym they're doing a three week challenge which I signed up for and I think I may be in slightly over my head...It started with a set circuit time trial and it will end with the same trial. The aim is to do better in the second trial than you did in the first. But, that's not the hard bit...the hard bit is that over the next three weeks I have to go at least 15 times which will absolutely kick my butt! Eep! Anyways my first time trial came in at 13mins 47 so we shall see how it goes, wish me luck!