Exercise in Las Vegas?

Las Vegas is known to be hot and during the summer you can practically forget trying to do anything active outside (trust me I have tried). Yesterday, I had my first physical therapist appointment for my knee. I was again told to stop running on it!! This is hard news to take when all I really like to do actively is run. The physical therapist told me I could bike...bike? The only bike I have is from my mission and it's probably not the best bike in the world. Actually I know it's not. My boss who is a majorly obsessed bike connoisseur has had my bike for a couple of days fixing it up as best he can. I got it back today and it actually looks like a whole new bike. Well, at least it feels like a new bike!! He also is letting me borrow his biking um... contraption (for lack of a better word). You stick your bike on it and peddle. The bike doesn't move! I tried it out today and I have fallen in love with it! I felt strange however, biking on my mission bike and not wearing a skirt. HA!

P.S. Josh, this is what it looks like.