Knee pain. Time to get moving as summer is coming

Almost 2 years ago to the day, I was working alone in Ormond Beach, my friend didn't show. I was about 15'in the air, the heavy extension ladder shot out on the tile floor. I had time to say " Oh ****" sorta... dug cedar outta my fingernails for a minute. Knees ain't been the same.. getting WAY WORSE!