well for my 5x5 squat i only squat on monday and thursday. On monday i do 5x5 same weight each set and on thursday i do 5x5 with 90% of monday same weight each set. And on my 20 rep squats and 3x8 i did 20 reps on Monday and 3x8 on Thursday. Before i started doing 20 rep squats for four weeks the most i could do for 5x5 was 205 and then after four weeks i got up 240 for 5x5. thats all i did and i gained strenght.