A horizontal pull that builds the back the easy bar can't.
Stay flat and braced like a plank the whole time. Don't let your hips sag.
Rowing your body up to a hip-height bar with your heels on the floor puts you in a moving plank, and holding that rigid line from shoulders to heels is where the lower back earns its keep on every rep, refusing to let your hips sag while your arms pull your chest to the bar. The horizontal angle makes it the natural counterweight to all the pressing most people do. It earns its place as a scalable, equipment-light pull you can make harder by simply walking your feet further under the bar.
Same family of movement, a horizontal bodyweight pull under a low bar. The details that matter here are the hip-height bar, straight-arm dead hang between reps, and a strict plank line from head to heels throughout.
Bar height is the dial, a higher bar puts you more upright and makes reps easier, a lower bar or elevated feet tips you flatter and harder. Master a strict body line at one height before dropping the bar.
Your trunk and lower back are giving out before your arms, which is common and exactly what the exercise trains. Squeeze your glutes, brace like a plank, and end the set the moment the line breaks, sagging reps teach the wrong habit.
