When I'm writing, I sit in front of the computer, but most of the time when I'm reading I exercise by pedaling on this recumbent bike. Last night I went over eight miles--though I wasn't pedaling very fast. I used to have an elliptical machine, but it was too strenuous and distracting for reading.
I like to go outside when the weather is nice. I enjoy walking and gardening, but cycling while reading is a good way to keep the blood pumping.