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.
If I'm reading the excerpt correctly, it references a range of 2.5 to 4 m. I'd rather see that range increased to a full event distance.
That wouldn't work. They need to isolate the effect of the dolphin kick. If they measured an entire race it would be too difficult to exclude other effects.
Anything allowed in the rules is, by definition, not cheating. You don't see many people still touching the wall on their backs in backstroke turns, do you?
If I'm reading the excerpt correctly, it references a range of 2.5 to 4 m. I'd rather see that range increased to a full event distance.
That wouldn't work. They need to isolate the effect of the dolphin kick. If they measured an entire race it would be too difficult to exclude other effects.
Anything allowed in the rules is, by definition, not cheating. You don't see many people still touching the wall on their backs in backstroke turns, do you?
