Please be very careful with that leg press, Jenn. We recommend not using them at all for new knees, because of the danger of twisting.Went to the gym today and tried the leg extension machine. Was able to struggle through 10 reps at 10lbs on my right knee. That sounds about where it should be at 3m out. Left leg - I couldn't even lift the bar. Crazy how weak that 6m old leg is still.