I had both knees replaced two years ago. I walked three steps the day after surgery and down the hall the day after that. I went to physical therapy twice a week for the following year during which my flexion and power was repeatedly pushed.

I went on my annual Alzheimer’s Research fundraising hike one full year after surgery and was exhausted within an hour. My knees were not working like I expected. I was disappointed and angry, realizing that my knees were never going to be what I wanted them to be.

I continued with my workouts over the next year – stationary bike and exercise ball – and headed out, a little anxious, for another fundraising hike this past month. It was remarkable how much my knees had improved – flexion, power, stability, the works.

Incremental change is impossible to detect from one day to the next. But then, seemingly out of the blue, mountains are climbed. It just took some pain and patience.