This is a great superset for the posterior chain: the hamstrings, glutes, and lower back. Without resting between exercises, perform the Romanian deadlift, a sled push and then a sumo deadlift.
Elevate the toes on the Romanian deadlift to better target the hamstrings.
Pushing the sled with a wider leg stance better targets the glutes.
For the sumo deadlift, avoid raising the hips too fast when you lift off the floor. As soon as you pass the knees, snap those hips forward by squeezing the glutes.
For this anti-extension core exercise, set up in a slight forward lean. Fall forward with no back sag. Shift your weight onto your heels to return to the start.
Being strong isn't enough. You need to be strong for your size. That's the difference between relative strength and absolute strength. Here's what will get you there.