Few gym debates run longer than sumo versus conventional. One side calls sumo cheating; the other calls conventional a back-ache generator. Both sides are grading one lift with the other lift's rubric — which is the actual error, and the first thing worth fixing.

Here's what genuinely differs, what doesn't, and how to pick.

What actually differs

Conventional: feet roughly under your hips, hands outside your legs. The hips sit between the knees and the shoulders at setup, the torso leans deeply forward, and the hinge is big and obvious — a large sweep of torso angle from floor to lockout. The hamstrings and back carry a proportionally larger share.

Sumo: a wide stance, toes angled out, hands gripping inside the legs. The wide base lets the hips start closer to the bar, so the torso is markedly more upright, and the knees push out over the toes. The hips and legs carry a proportionally larger share, and the range of motion is shorter.

Now the part the debates miss: an upright torso in sumo is not a missing hinge. It's the geometry of the stance doing exactly what it's designed to do. Grading a sumo pull as "not enough forward lean" is like grading a hammer for being a mediocre screwdriver. Likewise, conventional's deep forward lean isn't a hazard to be coached out — it's the hinge working. Judge each by its own standard, always.

What stays true in both

Every principle that makes a deadlift a deadlift survives the stance change:

  • One spine shape, held from floor to lockout. The angle differs by variant; the no-shape-change rule doesn't.
  • The bar rises in a near-vertical line, staying close — hips and shoulders leaving the floor together.
  • The lockout is tall and plumb: hips through, knees straight, ribs down.
  • Reps start from a set position, not from a bounce.

Sumo adds one checkpoint of its own: knee symmetry. With both knees pushed out over angled toes, a knee that caves inward mid-pull shows up clearly from the front — which is the one place a front-on camera earns its keep over side-on.

How to choose

Try both for a few weeks, light, and let two signals vote. Comfort: limb proportions and hip structure make one stance feel like home and the other like a rental — that signal is real, so respect it. Pattern quality: which stance lets you hold the standards above at working weight? The variant you can do well beats the variant you like in theory.

The drill — Paused Deadlifts Below the Knee

Whichever stance wins, this drill transfers whole: pull to just below the knee, pause two full seconds, then finish — 3 sets of 3, light. The pause verifies the shared fundamentals inside your chosen stance: hips and chest arriving together, back holding one shape, bar riding close. Sumo pullers find it especially useful for catching knees that drift inward under load; conventional pullers, for hips that leave early.

One practical note: tell your camera which lift it's watching. CoachVision asks for the variant when you upload a clip precisely so its AI coach grades sumo as sumo — upright torso expected, knees-out expected — and conventional as conventional, never marking one down for not resembling the other. Film a light set of each this month, compare the reads, and pick your stance with footage instead of forum threads.