This past July the 21st was the 6 month anniversary of my Right knee injury (Quad tendon coming off the Patella). That Saturday the 25th I squatted 135 for 10 x 3 sets.
The next Saturday, August the 1st I squatted 175 x 5 along with leg Press (315 x 12 x 3 sets) Then single leg Bulgarians with 25 pound DB’s in each hand x 3 sets of 8.
Then this past Saturday got down to business and upped the intensity:

Leg Extension x 12 S/S with Leg curls 4 x 12 reps / 8 / 6 / 4 adding more weight with each set.
Back Squats (Wave Reps) 10 / 6 / 3 then back to 10 / 6 / 3 adding weight with each wave a total of 6 sets. Using 185 x 3 both sets. Goal = 225 x 3.
Leg Press: 4 x 6 pause at the top and contract / and 6 with no pause at the top. Up to 405 x 12.
Walking Lunges x 3 with 30 pound KB’s in each hand.