You are doing really well. Your ROM, both flexion and extension, is excellent for so early in recovery.I have appreciated the PT sessions, and they are challenging without being pushy. I asked them to get some numbers yesterday. They don't put too much emphasis on that, but I wanted to know. My flexion was 117, but my extension was still a four, and that was with some passive help. That concerned me a bit. Should I be concerned much about still being a four??? At 3 1/2 weeks? I spend a lot of time sitting in my recliner elevating my leg and icing. I'm using 2 pillows going left-right at the end of the recliner, and then I put a pretty solid pillow going at a right angle to that...that's what I lay my operated leg on, keeping it as straight as I can. But there is still a slight bend, and that's why I'm concerned that I'm not getting to less than a four. Any suggestions?
You don't need to be at all concerned that your extension is 4. It often takes longer to achieve full extension than to achieve good flexion. It will come, with time.
This article suggests some ways in which you can help with extension.
Extension: how to estimate it and ways to improve it
Just choose a couple of exercises and do them gently. Don't use weights until at least 3 months post-op.
If you lengthen your stride when you're walking, that will also help with extension.
Well done for achieving those steps one foot at a time.Two sessions ago, my PT took me out behind to the back of the building where there were 5 steps with a railing going up from the parking lot to a level entrance area. It was a beautiful 70 degree day in Kansas (unbelievably nice for February). She wanted me to go down the steps. I said "You mean, step down a step and bring the other foot down to that step?" She said, "No....one foot per step." Having not attempted that, I really didn't think I could do it. Surprise...I did those 5 steps with no difficulty, going down AND up. Totally surprised and amazed myself.
However, it's really a little too early to be doing this on a regular basis. Most people take longer before they can do it, even as long as 3-4 months. Going up stairs foot over foot is usually easier than going down, which puts quite a strain on your new knee.
You're doing great!
New Zealand