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Muscle Function Obtained with Motion Mode Ultrasound and Surface Electromyography during Core Endurance Exercise
Published on: August 25, 2022
Relationship between intra-abdominal pressure and trunk EMG.
1Department of Kinesiology, University of Waterloo, Ontario, Canada, N2L 3G1.
Clinical Biomechanics (Bristol, Avon)
|August 7, 2013
Summary
This study explored the link between non-invasive EMG and intra-abdominal pressure (IAP). Findings suggest IAP
Area of Science:
- Physiology
- Biomechanics
- Kinesiology
Background:
- Intra-abdominal pressure (IAP) is crucial for manual lifting and breathing.
- Current IAP measurement methods are invasive, requiring transducers or sensors.
- A non-invasive method is needed to accurately assess IAP.
Purpose of the Study:
- To investigate the relationship between electromyography (EMG) and IAP.
- To assess the role of IAP in various tasks involving abdominal muscle activation.
- To determine if IAP plays a unifying role across different movement tasks.
Main Methods:
- Measured IAP and EMG from rectus abdominis, obliques, intercostals, and erector spinae.
- Subjects performed tasks requiring abdominal muscle activation.
- Analyzed the temporal relationship between muscle activation and IAP changes.
Main Results:
- Peak IAP reached 340 mmHg during the Valsalva maneuver.
- Most non-Valsalva tasks showed IAP below 100 mmHg.
- High correlations (r² > 0.80) between EMG and IAP were found only in specific activities like Valsalva.
Conclusions:
- IAP plays a task-specific role rather than a unifying one across diverse movement tasks.
- A rapid IAP response is crucial following vigorous abdominal muscle activation.
- The relationship between EMG and IAP is not consistent across all tested activities.
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