When it comes to protecting the lower back, there is no movement more important to learn than the hip hinge. The hip hinge is a term used in fitness and rehabilitation circles to describe bending at the hip instead of rounding the lower back. It’s taught in gyms as a precursor to exercises like the Deadlift and Squats. It’s kind of used like movement prep as hinging at the hip is a part of both of these exercises.
Now this is the important bit. The hip hinge doesn’t just belong in the gym. It’s a part of normal human movement. Every time you bend forward, you should bend at the hips and avoid rounding or flattening your lower back.