Good job, Denise. A few words about your warm up. For some people, their body just needs a longer time to warm up. Also, i have read you should increase your warm up time as you get older, a little bit more for each year (there was an exact number of minutes I read, but I forget). I have been riding for almost 6 years and no matter what, i always feel horrible for the first 20-30 minutes, or 10-12 miles. So this means on my after work loop rides, I feel like crap for about half of the ride!! On my longer rides, I take the time to go very slowly for awhile. It helps your muscles and you might be surprised to see that it also helps your breathing get regulated. After about an hour and a half, i often feel like I could go forever. I'm a little older than you, and I have found that it's becoming even more important as each year goes by. On Friday I go to a club ride that just goes out fast as h---. I am always swearing to myself and wanting to quit for the first few miles. Most of the riders are older than me, I don't know how they can do this. But after the first part, I usually end up with the front group. Everyone is different, but it works for me. This is even more important if you are going to be riding as the weather gets cooler.
It would be cool to me you someday. I suspect you have been riding near where I live. Keep up the good work!

Robyn