Iam 33yr old female, a physiotherapist with bilateral chondromalacia patellae with thinning of cartilage since 1yr. What precautions I need to take?

Avoid Squats! Avoiding deep squats and lunges and other activities that overload the patellofemoral joint is the key to avoiding surgery (arthroscopic chondroplasty or even patellofemoral arthroplasty). consider HA (Hyaluronic acid) supplementation as well.