I still have that occasionally....leg lifts on the bed help lots. Lift your foot just about 6 inches and hold it there for 10 seconds and slowly put it down and do as many as you can. You will definitely feel it in your thigh but it helps tremendously with that muscle. Mine is still weak but much better than where you are at 8 weeks. Keep working and you will see a huge difference in the weeks to come.

I’m 4 yrs out of a tkr and still have pain and tightness From an X-ray I was told my apparatus is a little loose. I’m working with a pt to strengthen the muscles around it