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Augmented feedback can change body shape to improve glide efficiency in swimming
Christopher Papic1, Jordan Andersen1, Roozbeh Naemi2
1Exercise and Sport Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia.
Sports Biomechanics
|April 6, 2021
Summary
Swimmers improved glide performance and efficiency using augmented feedback to reduce body curvature. This intervention enhanced mean velocity and glide metrics, offering practical cues for coaches and athletes.
Area of Science:
- Biomechanics
- Sports Science
- Fluid Dynamics
Background:
- Body curvature significantly impacts fluid dynamics and hydrodynamic resistance in swimming.
- Optimizing torso morphology is crucial for enhancing swimming performance.
Purpose of the Study:
- To assess the impact of augmented feedback on swimmers' glide performance.
- To evaluate changes in torso morphology resulting from the feedback intervention.
Main Methods:
- Utilized 2D landmark data to calculate glide efficiency indicators (glide factor, glide coefficient) and posture.
- Analyzed underwater images to derive torso dimensions, cross-sectional areas, and form gradients.
- Implemented a feedback intervention involving self-modelling visual feedback and verbal cuing.
Main Results:
- Significant improvements observed in mean velocity, glide factor, and glide coefficient (p < 0.001).
- Feedback intervention led to substantial effect sizes for glide efficiency metrics.
- Changes in form gradients correlated with reduced lumbar lordosis and chest convexity.
Conclusions:
- Augmented feedback effectively enhances glide efficiency and performance in swimmers.
- Modifying body curvatures through targeted feedback can optimize hydrodynamic resistance.
- The study offers practical strategies for coaches to improve swimmers' glide technique.
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