The purpose of this study was to investigate the effect of chains on power characteristics in the hexagonal barbell deadlift. Peak vertical ground reaction force (VGRF), average bar velocity, and peak rate of force development (RFD) were analyzed during four different conditions of various proportions of chains and constant resistance at 60% of each participants’ 1-repetition maximum (1RM) matched at the top of the lift. The four conditions included 60% of 1RM with no chains (NC), 60% of 1RM with chains accounting for 15% of total load (C15), 60% of 1RM with chains accounting for 30% of total load (C30), and 60% of 1RM with chains accounting for 45% of total load (C45). Ten resistance trained athletes, six males (21.2 ± 2.3 y, 175.5±7.1 cm, 80.8 ± 11.8 kg) and four females (20.3 ± 0.5 y, 163.8 ± 7.6 cm, 75.4 ± 15.6 kg), volunteered for the study. Significant differences (p < 0.05) in peak VGRF between NC and C30, NC and C45, C15 and C45, and C30 and C45 were found. Significant differences ( p < 0.05) in average bar velocity between NC and 30, and NC and C45 were found. No differences were observed in peak RFD. These results suggest that different proportions of chains and traditional resistance can alter force and velocity characteristics during the hexagonal barbell deadlift.
|Advisor:||Cotter, Joshua A.|
|Commitee:||Crussemeyer, Jill A., Schick, Evan E.|
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 58/02M(E), Masters Abstracts International|
|Keywords:||Chains, Deadlift, Force, Velocity|
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