Having gained some experience in this field, the best Post and prehab I can recommend is with a VERY qualified Rehab Pilates instructor. Not only will the pilates equipment be very beneficial to this patient, but the instructors knowledge on pilates style exercises will be of great value.
The amount of limited knee flexion is dependant on the patient and instructors knowledge, client feedback and level of reaction the next day.
The athletic pilates program we provide will keep the client fit in all other areas of the body while we 'isolate' the knee and perform different strengthening/ stabilizing exercises there.
If you are based in Sydney, we can get together and discuss. If not my email is [email protected]

Regards
Allan Menezes