Hug it, hoist it, and load it like a strongman.
Keep the bag glued to your body. The further it drifts, the more your back takes over.
Hoisting a dead, shifting bag from floor to platform is a glute-driven hip extension at heart, with your quads and hamstrings powering the pick and your back and core straining to keep the awkward load pinned to your chest. Because the sand shifts on every rep, no two lifts feel identical, and the bag punishes any gap between it and your torso. It earns its place as strongman-style conditioning that builds real-world hoisting strength no barbell can copy.
Roughly chest height is the classic standard, but anything from a bench to a box works. Lower platforms let you go heavier, higher ones demand a more violent hip extension, so pick based on what you are training that day.
Bag work is more forgiving of a rounded upper back than barbell lifting because the load hugs your body, but you still need a hard brace and the bag glued to your chest. If it drifts away from you, that is when your lower back starts eating the load.
Anything where you pick up something heavy and awkward, from strongman events to moving day. It builds grip, hip power, and full-body bracing under a load that fights back, which barbell training alone tends to miss.
