On my husband's 66th birthday

Today is my husband's 66th birthday. Bill has been a distance runner since his early teen years. He is a bit short on training at this point, since we are coming off a snowy winter, but he decided that he would do a looooong run today in celebration of his birthday.
So, he rode to work with me this morning. He had measured the distance from my office to home at 19 miles. (There is a shorter way, but it is hilly.) He figured he would have to walk some of it, but that he could do it.
He prepared himself with one of those backpacks that contain water, and stashed some granola bars and his cell phone in it also. He left my office at about 8:30.
Fortunately, I did not plan to work the entire day today. I left the office around 11:30 and drove his route. I had mentally calculated the approximate location I would find him in. I passed that point, and was thinking, "Wow, he must be doing better than I thought!"
But then, I saw a weary figure trudging along. I pulled in a parking lot just past him and got out of the car. He grinned and said, "Are you offering me a ride?"
He had made it about 15 miles, and decided to let it go at that.
When he was in his 20s, he once covered 60-some miles in one day...but that was 40+ years ago.
Growing older is strange. On the inside, you can still feel vigorous, but then you try to exert yourself, and discover your body doesn't cooperate. Or, you look in the mirrow and wonder, "Who is that old person staring back at me?"
Yup, my 64th birthday is next week.