No, you wouldn't be crazy and, yes, you can do it. I started running at 50 and ran a half-marathon at 51. I'm slow and I take it easy but I'm having a blast. The running and cycling definitely do compliment each other and it's a great way to stay in shape over the winter. The couch to 5k program works great. Just take it easy--we mature women don't recover as quickly as the younsters do.

So how good are you at swimming? You might be doing triathlons by next year