usually when a knee gets stiff at 8 weeks, it has been stressed by activity. All activities have to start slowly. The bike starts at 5 min, then 10, then 15. A good rule of thumb to try is if your knee is stiff after an activity, then back off---if now, slowly increase the time.
Now, what else were you doing besides the rowing machine and the bike? Back to work? shopping? house work? driving an hour to work? All of those activities take a toll on the knee too.
When I was 8 weeks out and trying to resume my life, my doctor stressed that I needed one hour of rest for every three hours I was up. Rest meant in bed with my knee propped up on three pillows!!!
If you are working right now, then you probably don't need any exercise added to your schedule until after your knee settles down from the extra walking, driving, etc. I am going to give you the recovery articles from our library that we recommend to new members. There are several about knee activity progression and returning to work that might be relevant to you.
First are the BoneSmart Recovery Philosophy. . .
-
rest,
elevate,
ice and
take your pain meds according to your prescription, don't wait for pain to occur,
don't overwork.
- If it hurts, don't do it and don't allow anyone - especially a physical therapist - to do it to you
- If your leg swells more or gets stiffer in the 24 hours after doing it, don't do it.
- Take note of
the BoneSmart view on exercise and how exercise may affect pain and swelling.
- If you won't die if it's not done, don't do it; if you must do it, short and sweet, not hours on your feet.
- Don't stand if you can sit; don't sit if you can lie down, don't stay awake when you can go to sleep
And here are some very crucial articles
The importance of managing pain after a TKR and the pain chart
Myth busting: no pain, no gain
Swollen and stiff knee: what causes it?
Activity progression for TKRs
Healing: how long does it take?
Chart representation of TKR recovery
Energy drain for TKRs
Elevation is the key
Ice to control pain and swelling
Home physio (PT) and activity progress: suggestions
Myth busting: the "window of opportunity" in TKR
Myth busting: on getting addicted to pain meds
Post op blues is a reality - be prepared for it
And wise words from members who have shared their experiences ...
Where are you in recovery?? (TKR)
Five “P’s” of knee recovery
TKR: work “smarter” and not “harder”
Recovering a knee - from one who knows!
It's never too late to get more ROM!
It's worth the wait for ROM