Originally Posted by mrsD

When I was in PT for my adductor injury, (thigh/groin ligament)
they taught me various isometric exercises to do in bed.
Contracting certain leg muscles, holding for a count of ten and relaxing, and repeat after counting to 30 or so. 10 reps and do twice or 3 times a day.

This moves the blood around and helps lymph return properly.
The muscles, then do not atrophy from disuse and the blood moves around preventing clots and improving circulation.

This is a similar process to having a machine do it for you.