Did exercise help or hinder your recovery from articular cartilage repair?

Help. Motion of effected joint and nonimpact activity appear to be valuable for cartilage nutrition and recovery from restoration procedures. By nonimpact I am referring to activities like swimming, cycling, walking which are safe in intermediate stages( 3 mos to 6-8 mos) after such procedures. Higher impact activites probably shouldn't even be considered until 10-12 mos post operatively.