Seated Row.

The back pulls. The lower back rests.

Most rowing exercises end when the lower back speaks up, not when the back is empty. Here the chest rests against a pad that keeps the upper body still, so you can pull until the lats and mid back are actually done without spending energy holding yourself upright. The pull comes straight towards the body with 90 kg in the stack, and you change the load with a pin instead of reloading. The machine is 1160 mm wide, 1505 mm long and weighs 220 kg. Back day without paying for it the day after.