During these times, I tend to focus on strength training my legs, rather than hypertrophy training. Multiple 1RM squat sets and the like. I get fantastic strength gains in my 1RM as well; it's fun doing a single squat 3x my weight.
I like doing hack squats, and I already use up every weight it possibly can hold for 8-11+ reps lol so 1 RM isn't possible for hack squats anyway. I imagine you are talking about regular squats, dam, then 1 rep max must be killer on your whole body for regular squats, like bar about to snap or what, how much weight you doing?