PURPOSE:To assess the effect of adding a dolphin kick to a breaststroke pullout.
METHODS:Eleven (20.9±2.3 yrs, 1.86±0.05 m, 79.6±5.5 kg) swimmers experienced with performing traditional and dolphin kick breaststroke pullouts participated in the study. Underwater video analysis was used to track whole body center of mass kinematics during a pullout. Time for the center of mass to travel distances ranging from 2.5-4 m from the initiation of the pullout were computed. Hand force data were derived from differential pressure measurements during the pulling phase of the pullout.
RESULTS:Use of a dolphin kick in a breaststroke pullout significantly (p=0.016) improved performance. Time for the center of mass to travel 4m after the initiation of the pull was reduced by 0.19 s. This performance improvement was not attributable to enhanced force production from the pull. Hand force was not significantly different between pullout techniques for the right hand (p=0.142) nor left hand (p=0.303). Total impulse produced by the pull was reduced by 3.6% (p=0.039, ES=0.34) when using the dolphin kick pullout.
CONCLUSIONS:These data suggest that the use of a dolphin kick during a breaststroke pullout provides a significant advantage over the traditional no-dolphin kick pullout. Furthermore, this advantage comes from enhanced propulsion from the kick but not the pull.
That would be TWO dolphin kicks and a violation of the stroke rules.
Yes, and it used to be that ONE dolphin kick was a violation of the stroke rules. I was trying to point out that there was a difference between progress (like the Berkoff blastoff) which wasn't anticipated by the current rules, versus trying to legalize your particular crime. :)
I believe that the single breaststroke dolphin kick was added, in part, because it was hard to judge whether it was part of the normal body undulation motion during the pull-down. If the kick is added before the pull-down, why wouldn't someone add a 2nd "subtle" kick during the pull-down?
That would be TWO dolphin kicks and a violation of the stroke rules.
Yes, and it used to be that ONE dolphin kick was a violation of the stroke rules. I was trying to point out that there was a difference between progress (like the Berkoff blastoff) which wasn't anticipated by the current rules, versus trying to legalize your particular crime. :)
I believe that the single breaststroke dolphin kick was added, in part, because it was hard to judge whether it was part of the normal body undulation motion during the pull-down. If the kick is added before the pull-down, why wouldn't someone add a 2nd "subtle" kick during the pull-down?
