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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Here is the source - they often come up with all kinds of interesting stuff. There is another one on the thumb position: ACSM 55th Annual Meeting Indianapolis, Presentation Number, 2110.
Just to clarify and translate -
Time for the center of mass to travel distances ranging from 2.5-4 m from the initiation of the pullout were computed
This is for a single pull-out and the analysis starts from the initiation of the pull-out (not starting from the wall - and no, they did not study Kitajima's pullout)
if I expend extra energy for a dolphin kick every 25/50 it will cost me somewhere else.
Even if it were 1.5 seconds over the course of a 200, for me that is about a .5% to 1% improvement. I'd rather spend the time I could spend on this to learn better effeciencies elsewhere in my stroke. Time spent learning a more efficient dive could probably give as much or more improvement, and could be transferrable to other strokes.
That makes no sense - are you really trying to tell me that you are not doing a single dolphin kick on your breaststroke pull-out ?
Here is the source - they often come up with all kinds of interesting stuff. There is another one on the thumb position: ACSM 55th Annual Meeting Indianapolis, Presentation Number, 2110.
Just to clarify and translate -
Time for the center of mass to travel distances ranging from 2.5-4 m from the initiation of the pullout were computed
This is for a single pull-out and the analysis starts from the initiation of the pull-out (not starting from the wall - and no, they did not study Kitajima's pullout)
if I expend extra energy for a dolphin kick every 25/50 it will cost me somewhere else.
Even if it were 1.5 seconds over the course of a 200, for me that is about a .5% to 1% improvement. I'd rather spend the time I could spend on this to learn better effeciencies elsewhere in my stroke. Time spent learning a more efficient dive could probably give as much or more improvement, and could be transferrable to other strokes.
That makes no sense - are you really trying to tell me that you are not doing a single dolphin kick on your breaststroke pull-out ?
