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Related Experiment Video

Updated: May 9, 2026

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

Published on: January 28, 2020

Intra-abdominal pressure during swimming.

S Moriyama¹, F Ogita², Z Huang³

¹Department of Sports Wellness Sciences, Japan -Women's College of -Physical Education, Setagaya-ku, Japan.

International Journal of Sports Medicine

|July 23, 2013

Summary

Competitive swimmers

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Published on: May 31, 2019

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Last Updated: May 9, 2026

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Published on: January 28, 2020

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A Novel Non-invasive Method for the Detection of Elevated Intra-compartmental Pressures of the Leg

Published on: May 31, 2019

Area of Science:

Sports Science
Biomechanics
Physiology

Background:

Intra-abdominal pressure (IAP) is crucial for trunk stability in athletes.
Understanding IAP during swimming can optimize performance.
The relationship between IAP and swimming mechanics requires further investigation.

Purpose of the Study:

To measure intra-abdominal pressure (IAP) in competitive swimmers at various front crawl swimming velocities.
To investigate the correlation between IAP and key stroke indices (stroke rate, stroke length).

Main Methods:

Seven highly trained male collegiate swimmers participated.
IAP was measured during front crawl swimming at 1.0, 1.2, and 1.4 m/s.
Stroke rate and stroke length were recorded as stroke indices.

Main Results:

Stroke rate significantly increased with velocity (P < 0.05).
Stroke length did not significantly differ across velocities.
Significant within-subject correlations were found between IAP and stroke rate/length (P < 0.01).
No significant correlations existed between IAP and stroke indices when controlling for velocity.

Conclusions:

Swimming velocity, not IAP, appears to be the primary driver of stroke index changes.
Current findings do not support the efficacy of trunk training focused on increasing IAP for competitive swimmers.
Further research may explore other factors influencing IAP and swimming performance.