For my at-home strength-building therapy, my physical therapist instructed me to do squats (2 sets of 15, twice a day) and step ups (again, 2 sets of 15, twice a day) on my injured right leg (but I do both legs, to even it out!
). Also, she wants me to do heel raises (I lost a LOT of mass in my right calf!) and a couple of other balance/strengthening exercises for my ankle, calves, and hips. Plus bridges. I keep forgetting to do those!
Of course, your PT should recommend something for your specific needs. Maybe it's too early in your rehab to do that type of thing? I didn't start doing squats and stuff until much later. I was going to PT for almost two months and those major lower body exercises didn't come along until I was almost done with my insurance-approved PT sessions, so...maybe discuss any at-home exercise routine with your PT first.
HTH,
Donna