Part 1: Back Squat 3/5/7/9
Reduce weight each set if necessary.
If your legs are sore, do 4×3 light weight pause back squats.
Or use this time to practice hang power cleans.
15 hang power cleans
Option 1: 95/65
Option 2: 75/55
Option 3: 20 kb swings instead of hang power cleans
Option 1+: 115/75; heavy wallball
The barbell should be relatively light for you. Choose your option accordingly.