Ten years ago, Keith Magnuson could easily walk 6 miles a day. Today, he can barely manage 100 yards.
The 83-year-old living in Seattle’s Cedar Park neighborhood has a condition called lumbar spinal stenosis. Put simply, the lower part of his spinal canal has narrowed over time, and the resulting pressure on his nerves causes pain whenever he walks or even stands for more than a few minutes.
“Anytime I’m on my feet, I’m hurting,” he said. On a clear March day, he sat on his couch looking out over the water, reminiscing about the activities he used to do — from water skiing to rock climbing…