Mountain Bike Gearing Techniques

What type of exercises can I do with my Mountain Bike?
I work on a mountain bike, as in 8 hours straight, pedaling around a parking garage. I’ve been doing things such as pedaling up the up-ramps, carrying my bike up and down stairs and doing a couple miles in the highest gear. I was hoping to find a site showing some different exercises or techniques I could do while riding at work but everything seems to revolve around exercise bikes.
If you are ridding around in a parking garage then you ARE doing exercise! Keep it up until it gets too easy.
Mountain Biking for Tips, Techniques & Etiquette : How to Shift When Mountain Biking

