Many important and common exercises at the gym involve understanding how to hinge from the hips. Deadlifts, squats, kettlebell swings, in particular, require it.
Hinging is different from bending forwards. New trainees usually have a hard time understanding the difference, so here is a simple exercise for them.
Targeted muscles will be gluteus maximus and hamstrings. Spinal erectors and abdominal muscles also come into play..
A wall and a rod is everything we need to practice this movement properly. Have the trainee stand about a foot apart from the wall. the rod must contact the head, thoracic spine, and sacrum at all time.
Simply ask the person to touch the wall with the buttocks, keeping the rod in contact as previously described.