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Effect of a Hexagonal Barbell on the Mechanical Demand of Deadlift Performance

Department of Sport and Exercise Sciences, University of Chichester, College Lane, 19 6PE Chichester, UK
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Sports 2017, 5(4), 82; https://doi.org/10.3390/sports5040082
Received: 27 September 2017 / Revised: 12 October 2017 / Accepted: 21 October 2017 / Published: 24 October 2017
(This article belongs to the Special Issue The Role of Strength on Performance in Athletic Tasks)
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Abstract

This study compared typical mechanical variables of interest obtained directly from barbell motion during deadlift performance with a conventional (CBD) and a hexagonal barbell (HBD). Eleven men, proficient with both deadlift variations, volunteered to participate in the study (age: 20.3 ± 0.6 years; height: 175.5 ± 8.5 m; mass: 88.7 ± 19.0 kg; CBD 1RM: 183 ± 22 kg; HBD 1RM: 194 ± 20 kg). During the first session, CBD and HBD 1RM was assessed; during the second session, they performed 3 sets of 1 CBD repetition with 90% 1RM; and in session three, they repeated this process with the HBD. Barbell displacement was recorded at 1000 Hz and mechanical parameters derived from this. Significantly heavier loads were lifted during HBD (6%, p = 0.003). There were no significant differences between barbell displacement (p = 0.216). However, HBD was performed significantly faster (15%, p = 0.012), HBD load was accelerated for significantly longer (36%, p = 0.004), and significantly larger mean forces underpinned this (6%, p < 0.001), with more work having been performed (7%, p < 0.001) at greater power outputs (28%, p < 0.001). The results of this study showed that heavier HBD loads can be lifted through the same range of motion faster, and that this load is accelerated for significantly longer. The strategies used to achieve these differences could have a significant effect on training outcomes. View Full-Text
Keywords: strength and conditioning; linear position transducer; biomechanical analysis; resistance exercise strength and conditioning; linear position transducer; biomechanical analysis; resistance exercise
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Lake, J.; Duncan, F.; Jackson, M.; Naworynsky, D. Effect of a Hexagonal Barbell on the Mechanical Demand of Deadlift Performance. Sports 2017, 5, 82.

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