Then the bend ROM. I’m at 90!! You don’t know how happy that made me. Being a slower healer and my old TKR was stuck at 75 for a long time. Didn’t reach 90 till about 4 months. So to be at 90 now made my day, my week! He was negative tho. Said it should be way more. Ride the bike for an hour a day! Sit/stand 30 times 20 times a day! Or maybe he should just take me back to OR and cut out the adhesions.
What a kill-joy he was!
90 degrees at 6 weeks is absolutely fine, and it will continue to improve slowly.
There's no need to rush to get ROM (Range of Motion) because it can continue to improve for a year, or even much longer, after a knee replacement. There isn't any deadline you have to meet:
Myth busting: the "window of opportunity" in TKR
And you don't have adhesions. They don't form so early.
He was just (meanly) trying to frighten you into working harder. Don't fall for that - it's not exercising that gets you your ROM - it's time. Time to recover, time for swelling and pain to settle, and time to heal. Your ROM is there right from the start, just waiting for all that to happen, so it can show itself.
Are those stand sit stand sit exercises recommended here on Bonesmart? And can we swim now, at 6 weeks?
You get those stand-sit exercises naturally every time you sit down on a dining chair and stand up again. I don't think you need to do any more of them than that. If you overdo the exercises, you'll just irritate your knee and make it more swollen and stiff, which is counter-productive.
As for swimming - if your incision is completely healed, with no open areas or scabs, then going in the pool is OK. IF it's not at that stage yet, wait until it is. Immersing yourself in water before your incision is totally healed just might introduce some infection.
When you do go in the pool, be careful not to overdo things. Because the water bears most of your weight, it's easy to do too much without realising it - until you get out and find you are totally exhausted.