Joint torque comparison of conventional vs hex bar deadlifts

[galapogos]

A biomechanical analysis of straight and hexagonal barbell deadlifts using submaximal loads

The purpose of the investigation was to compare the kinematics and kinetics of the deadlift performed with 2 distinct barbells across a range of submaximal loads. Nineteen male powerlifters performed the deadlift with a conventional straight barbell and a hexagonal barbell that allowed the lifter to stand within its frame. Subjects performed trials at maximum speed with loads of 10, 20, 30, 40, 50, 60, 70, and 80% of their predetermined 1-repetition maximum (1RM). Inverse dynamics and spatial tracking of the external resistance were used to quantify kinematic and kinetic variables. Subjects were able to lift a heavier 1RM load in the hexagonal barbell deadlift (HBD) than the straight barbell deadlift (SBD) (265 ± 41 kg vs. 245 ± 39 kg, p < 0.05). The design of the hexagonal barbell significantly altered the resistance moment at the joints analyzed (p < 0.05), resulting in lower peak moments at the lumbar spine, hip, and ankle (p < 0.05) and an increased peak moment at the knee (p < 0.05). Maximum peak power values of 4,388 ± 713 and 4,872 ± 636 W were obtained for the SBD and HBD, respectively (p < 0.05). Across the submaximal loads, significantly greater peak force, peak velocity and peak power values were produced during the HBD compared to during the SBD (p < 0.05). The results demonstrate that the choice of barbell used to perform the deadlift has a significant effect on a range of kinematic and kinetic variables. The enhanced mechanical stimulus obtained with the hexagonal barbell suggests that in general the HBD is a more effective exercise than the SBD.

[xarope]

I've yet to use a hex bar, so I don't know how different it feels compared to a normal straight bar for DLs, but would we be able to simulate this using two separate bars, but with one end anchored (loosely)?

e.g. load weight on one end only, and grab near the collar (but still inside the bar), the other end either on the floor or supported by a bench/rack with some bands to reduce the movement?

[galapogos]

It's sorta like a double handed suitcase deadlift, or the initial lift off for a farmer's walk. I find it more back friendly, but the mechanics are quite different from a conventional deadlift.

What you're describing sounds like a wheelbarrow deadlift or car deadlift, where one end is anchored.

[xarope]

hmm, will have to try one day when I'm back in the states and have access.