I don't know. I have never trained for a century.

But the only way I have got better on a bike is not by doing workouts at the gym, or other exercise.

The way I get faster on my bike, and the way I ride longer and longer distances, is to ride more... for longer, or harder.

And thats how I would approach a century. And I would make sure that before I rode the organised event, I would have ridden several century training rides... and if possible would have ridden the actual course at least once.

Good luck and we will be looking forward to hearing how it all goes