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.
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He's saying they made it legal because it was hard to judge whether or not someone was doing a dolphin kick or just undulating. His point is that someone could do the dolphin kick before the pull and then sneak in a second one at the end of the pool, making it look like it's just an undulation. So, assuming I'm correct in communicating his point, he's basically asking where does it stop?
He's saying they made it legal because it was hard to judge whether or not someone was doing a dolphin kick or just undulating. His point is that someone could do the dolphin kick before the pull and then sneak in a second one at the end of the pool, making it look like it's just an undulation. So, assuming I'm correct in communicating his point, he's basically asking where does it stop?
