I keep injuring myself when I run. Right now I have either a strained Achilles tendon or heel bursitis. This isn't my first injury. So I need to find other exercise, at least until this heals up. It's almost summer and I was so looking forward to running outside. I could probably get a decent workout biking, but I hate it. My helmet is pinchy. My lower back aches when I climb hills. My hands are numb after a while even if I change positions. It's boring but I can't listen to my iPod. I have to ride a fairly long way through scary traffic to get to a bike trail.