Hey! Good to hear from everyone!
Bloomer, shoes can affect everything! I once thought I had developed arthritis in my knees, and it turned out I was wearing bad shoes--they put all the stress in the wrong places on both knees. Once I changed shoes, my "arthritis" magically disappeared. Also, when my good athletic shoes got too worn, I would get sore feet (plantar fasciitis). That also disappears when I get good shoes.
CountingDown, San Francisco is my favorite city--I love it! I'm so glad you walked GG Park--it's a wonderful place.
Spinymouse, I decided I didn't care how silly something might seem, I would do it if it helped me. I like the elliptical machines because I can go faster and get a better workout without so much joint and back stress as, say, running through the streets. I like the exercise bicycles for the same reason, plus I never liked riding a real bike on the road--it seemed dangerous. I found, also, that at my old YMCA using the machines was a good opportunity to watch TV shows I ordinarily wouldn't (you brought your own earphones). There are worse things that laughing at Judge Judy while getting fit!

So... in a way, we're all hamsters in a cage all the time... or not!
hijude,
Jay