We need to begin by noting that everyone is different. Every patient is in a different condition healthwise and has a different rate of recovery. Some people are born with more flexion than others, and greater extension in their knee joints. Some have complications, such as severe osteoarthritis degradation, which can be more difficult to overcome after a knee reconstruction. Knee stiffness and other conditions can also impact the range of motion post-surgery. One of the best indicators of your knee range of motion after your surgery is the range of motion before surgery. As a rule, knee flexion of around 125° will allow you to carry out all of your normal activities. For simple daily living, knee flexion of around 105-110° is a requirement. An approximate range of motion for various everyday tasks is as follows; 65° to walk 70° pick an object off the ground 85° to climb upstairs 95° to stand from a sitting position 105° to tie shoelaces 115° (or greater) to squat or sit cross-legged 125°+ covers most activities. However, squatting or sitting on your heel may always prove challenging. Every person has a different range of motion before surgery, and they all heal at different rates too. As per the recommendations of US-based orthopedic surgeons and physical therapists, your flexion goals should be as set out below; Stage 1 at 0-2 weeks post-surgery is 65-90° flexion. This allows for walking with no assistance, standing, and some stair climbing. Climbing stairs must be done with support. Before leaving the hospital your doctor will aim for 90 ° of flexion, or as close to this as possible. Stage 2 at 2-6 weeks should be around 115°. Here you should be seeing noticeable improvements from early recovery. This means more normal movements, bending to the ground, sitting down, and even tying your own shoelaces! Stage 3 is at 12 weeks + and this should allow you to reach a flexion of 115° or more. The timeframe for this range of motion varies between patients and it is something you should be working towards at this stage. A flexion of 125 ° is great and 135° or more is excellent. During each stage, it is important to keep working with your surgical knee and artificial knee prosthesis. The first 3 months of recovery are critical to work the knee and attempt to get it back to its original flexibility. This includes bending, extension, and movement. Staying idle, being inconsistent, or not being fully committed to your recovery will cause your knee to become stiff and it will be harder to work with later. This means that revision surgery may be required at a later date and the joint will cause lifelong issues.