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 (2023) 22, 571 - 581   DOI: https://doi.org/10.52082/jssm.2023.571

Research article
Technical Skills Influences on Front Crawl Tumble Turn Performance in Elite Female Swimmers
Frédéric Puel1, Philippe Hellard2,3, , David B. Pyne4, Julien Morlier5
Author Information
1 Laboratoire Performance, Santé, Métrologie, Société (EA-7507), Reims Université, France
2 CREPS Resource and expertise center on sports performance in Bordeaux, Bordeaux, France
3 CETAPS EA3832, Rouen University, France
4 Research Institute for Sport and Exercise, University of Canberra, Canberra, ACT, Australia
5 PMH-DySCo, IMS, CNRS UMR5218, Bordeaux University, France

Philippe Hellard
✉ CETAPS EA3832, Rouen University, France
Email: hellard.ph@gmail.com
Publish Date
Received: 19-09-2022
Accepted: 23-08-2023
Published (online): 01-09-2023
 
 
ABSTRACT

The objective of this research was to compare technical skills composed of kinematic and kinetic variables in the complex motor task of a tumble turn between 9 elites and 9 sub-elite female swimmers. The best tumble turn among three attempts was analyzed using a three-dimensional underwater protocol. A total of 37 kinematic variables were derived from a Direct Linear Transformation algorithm for 3D reconstruction, and 16 kinetic variables measured by a piezoelectric 3D force platform. Data were analyzed by Student's t-test and effect size statistics. Pearson correlations were applied to the data of the eighteen swimmers to relate the association of 53 kinematic, kinetic variables to the performance of the tumble-turn (3 meters Round Trip Time, 3m RTT). The approach and the whole turn times were faster for elite swimmers compared to sub elites (1.09±0.06 vs. 1.23±0.08 sec, and 2.89±0.07 vs. 3.15±0.11 sec.), as well as the horizontal speeds of the swimmers’ head 1 m before the rotation (1.73±0.13 vs. 1.57±0.13 m/sec.), at the end of the push-off on force platform (2.55±0.15 vs. 2.31±0.22 m/sec.) and 3 m after the wall (2.01±0.19 vs. 1.68±0.12 m/sec.). Large differences (|d| > 0.8) in favor of the elite swimmers were identified for the index of upper body extension at the beginning of the push-off, the lower limb extension index at the end of push-off, and among the kinetic variables, the horizontal impulse and lateralization of the push-off. Correlations for the whole group revealed a moderate to strong relationship between 6 body extension indices and 3mRTT performance. For the kinetic variables, the correlations indicated the fastest swimmers in 3mRTT showed large lateral impulse during placement (r=0.46), maximum horizontal force during the push-off (r=0.45) and lateralization of the push-off (r=0.44) (all p<0.05). Elite female swimmers had higher approach and push-off speeds, were more streamlined through the contact, and showed a higher horizontal impulse and lateralization of the push-off, than their sub-elite counterparts.

Key words: Biomechanics, complex motor skill, swimming, 3-D analysis


           Key Points
  • Swim speeds were faster for expert swimmers 3 m before the turning wall, 1 m before the rotation, at the end of the push-off on the force platform and 3 m after the wall.
  • For the technical skill variables, in the 18 swimmers the 3mRTT was significantly correlated with greater postural extension at key moments of the start of contact, start of push-off, end of push-off.
  • For kinetic variables the elite swimmers were characterized by higher push-off impulse and lateralization of push-off. For the group as a whole, performance was significantly correlated with the lateral impulse during placement, the maximum horizontal force and the lateralization of the push-off.
 
 
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