So, I wore my heart rate monitor on my walk today. It's been a while since I walked in the neighborhood, which is called Mountain Creek for a reason. My heart rate got up to 173 with the first hill. I'll be 50 in December. You do the math. Yep - I slowed down and decided to just enjoy the walk as much as I could.
I am feeling dizzy and a bit light headed. Like I used to feel after one of my grueling work out sessions from before. The heart rate monitor is being used now to stop feeling like that so the next time I walk, I'll take it a bit easier and not do any "intervals" on the flat part before the hills.