Hello! I am a 46 year old former runner, too--had to stop due to extreme pain when running. I have fallen back in love with cycling! I have a great road bike and wonderful places to ride--love the hills, and use riding to test myself every ride. I do not miss running and the pounding my body has taken, though I did miss the exhiliration--but cycling gives me that! I love going fast--I love it all. My average ride is a 25 miler through hilly wheat fields where I have seen lots of deer, wonderful birds, and last year even sighted a cougar in the distance. So, I hear ya sistah!