Knee exercises help to improve range of motion, strength and endurance.
It is important to understand the phases of rehabilitation, so that you choose exercises that are appropriate to your own level of healing and recovery.
Effectiveness of physiotherapy exercise after knee arthroplasty for osteoarthritis: systematic review and meta-analysis of randomised controlled trials. Minns Lowe CJ, Barker KL, Dewey M, and Sackley CM. BMJ. 2007 Oct 20; 335(7624): 812.