This has been one of my favorite supersets ever since I started pairing up push and pull days in one upper body day.
The idea is that while you’re resting the push muscles that just worked (chest, triceps, shoulders etc) you work the antagonist muscles (back, biceps, traps etc) instead of just sitting on your phone checking Instagram.
This will not only save you time, but will even help performance. Your pushing strength will increase when you do a pulling exercise during the recovery time.
This is a great way to make sure your muscles are well balanced, and is also a great way to stay functional and athletic.