Try German Volume Training, you don't use anywhere near your maximum weights and you anihilate your muscles!
I'll give you an example, a friend of mine normally trains with 180kg for Squats - I got him to try GVT - 10 sets of 10 reps with 50kg on the bar(he laughed at me, thought I was taking the piss but I convinced him) he still couldn't walk properly after 4 days!
https://www.hypermuscles.com/f69/ret...training-6209/