A sumo deadlift is a weightlifting exercise where you pick up a heavy barbell from the ground using a wide stance, similar to the position sumo wrestlers use. Full definition
Comparing the effects of deadlift technique, Escamilla et al. (2000) found no differences between conventional and sumo deadlift styles (222 ± 34 kg vs. 215 ± 33 kg), although the population was not identical for each 1RM test. (strengthandconditioningresearch.com)
Assessing the effects of equipment, Escamilla et al. (2002) explored erector spinae muscle activity (at L3) during conventional and sumo deadlifts with and without a weightlifting belt. (strengthandconditioningresearch.com)
WARM - UP Group Dynamic SKILL The Movements WOD Team «Fight Gone Bad» One minute at each station, for total reps Wall Ball Sumo Deadlift High Pull Box Jump Push Press Row for Calories [See your Coach for further scaling options] (crossfitsanitas.com)