Hi Arlene, Great news on the full rotation on the under desk pedal exerciser! Remember that it is still early days and you'll enjoy further progress in the months to come on this often one year recovery.
Your leg endured major trauma, in a very small area, albeit controlled. Your muscles, tendons, ligaments and other soft tissue is going to cause you discomfort and pain for a while yet.
The tight band sensation, it is caused by scar tissue, but not the adhesions type of scar tissue.
During surgery your OS undercuts the skin and superficial structures from the center, to each side of the knee, to obtain access all round the bones. While healing, those flaps re-attach themselves to the main body of the leg, creating a thin layer of scar tissue across the front and sides of the knee. Scar tissue isn't as flexible as normal tissue so it feels like a clamp across the knee if there is any swelling and later during normal activity.
In time it gradually reduces in size and thickness until it reaches a point where it's not substantial enough to cause this sensation, same goes for the incisional scar in the skin. This can take several months to dissipate completely and often excess walking or standing can make it worse. This differs from person to person.
I hope you have a good rest of the week! Thanks for the update.
@Charlierun