Relaxation treatment (RT) is applied additional to standard physiotherapy treatment. RT includes 8 sessions (2 times a day, for four days after surgery) of relaxation exercises.

Standard postoperative rehabilitation program is applied to Control Group. Knee-based exercises were undertaken in supine (active- assisted knee flexion using a bandage, inner range quadriceps contractions, and straight-leg raises), seated (active-assisted knee flexion using the contralateral limb and inner range quadriceps contractions), and standing (hip and knee flexion, active hamstring curls, lunges on a step, hamstring stretches) postures.

Relaxation Group recieve progressive muscle relaxation exercises additional to the standard exercises. The relaxation exercises are applied two times a day till the discharge day starting on the postoperative day one. Progressive muscle relaxation included the relaxing of different muscle groups along with deep breathing. The maximal contraction period consist of the contraction of muscle groups around ankle, calf, knee, hip, lumbar, thoracic and cervical regions, shoulder, arm, forearm for 5 s and continued with a relaxation period for 30 s while focusing on breathing. These two periods ware repeated for each muscle groups and lasted approximately 30 min

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