It's really hard to come up with alternative exercises that don't involve your hamstrings and get your heart rate up... any suggestions are greatly appreciated!

I went to see my primary care doctor this morning and his response about the hamstring was what do you have planned in the next 6 months? 6 months? Yep, that's how long it could potential take to heal. It's a long slow healing process and in order to avoid 100% of fitness loss then I'm going to have to figure out something to do.

More importantly I have to keep my spirits up.