Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2007) 06, 58 - 62

Research article
Underwater Stroke Kinematics During Breathing and Breath-holding Front Crawl Swimming
Nickos Vezos , Vassilios Gourgoulis, Nickos Aggeloussis, Panagiotis Kasimatis, Christos Christoforidis, Giorgos Mavromatis
Author Information
Department of Physical Education and Sport Science, Democritus University of Thrace, Greece

Nickos Vezos
‚úČ Democritus University of Thrace, Department of Physical Education and Sport Science, 7th Km Komotini-Xanthi, 69100 Komotini, Greece
Email: nvezos@phyed.duth.gr
Publish Date
Received: 27-10-2006
Accepted: 16-12-2006
Published (online): 01-03-2007
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ABSTRACT

The aim of the present study was to determine the effects of breathing on the three - dimensional underwater stroke kinematics of front crawl swimming. Ten female competitive freestyle swimmers participated in the study. Each subject swam a number of front crawl trials of 25 m at a constant speed under breathing and breath-holding conditions. The underwater motion of each subject's right arm was filmed using two S-VHS cameras, operating at 60 Hz, which were positioned behind two underwater viewing windows. The spatial coordinates of selected points were calculated using the DLT procedure with 30 control points and after the digital filtering of the raw data with a cut-off frequency of 6 Hz, the hand's linear displacements and velocities were calculated. The results revealed that breathing caused significantly increases in the stroke duration (t9 = 2.764; p < 0.05), the backward hand displacement relative to the water (t9 = 2.471; p<0.05) and the lateral displacement of the hand in the X - axis during the downsweep (t9 = 2.638; p < 0.05). On the contrary, the peak backward hand velocity during the insweep (t9 = 2.368; p < 0.05) and the displacement of the hand during the push phase (t9 = -2.297; p < 0.05) were greatly reduced when breathing was involved. From the above, it was concluded that breathing action in front crawl swimming caused significant modifications in both the basic stroke parameters and the overall motor pattern were, possibly due to body roll during breathing.

Key words: Swimming, front crawl, three-dimensional kinematic analysis


           Key Points
  • The breathing action increases the duration of the total underwater pull.
  • The breathing action increases the absolute backward displacement of the hand.
  • The breathing action caused significant modifications in the overall motor pattern, possibly due to body roll during breathing.
 
 
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