Motion Analysis of a Barbell Romanian Dead-Lift versus a Hex-Bar Romanian Dead-Lift in Females

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While performing a Romanian dead-lift (RDL), the barbell has been used traditionally, however the hex-bar has recently gained popularity in regards to dead-lift performance. Several past studies have suggested that when performing an RDL using a hex bar, there is significantly greater increase in knee and hip flexion vs a barbell where there is significantly greater torso flexion. In theory, this would allow for heavier weights to be lifted using the hex-bar rather than the barbell. The majority of these studies have focused on young male athletes. These studies have failed to take into account the biomechanical differences in males and females when performing an RDL. Our approach was to use a novice female athlete and record several repetitions of her performing an RDL using both a hex bar and standard barbell with markers on her knee, hip, and shoulder to track the angle changes. We then used Kinovea to analyze and track the markers as she performed the RDLs in order to calculate the angular changes in her knee, hip, and torso. We found that there were no significant angular changes within the leg segment when comparing the hex bar and barbell while she performed the RDLs with max angular flexion at approx. 93° using the hex bar and approx. 92° using the barbell. We found slight angular changes within the torso segment when performing the RDLs with the max angular flexion at approx. 107° with the hex bar and approx. 90° with the barbell.

First Advisor

Hyung Suk Yang

Research Area

Kinesiology & Sport Science

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