More Complicated Than it Looks
| Autor: | Marlene J. Egger, Robert W. Hitchcock, Ingrid Nygaard, Nadia M. Hamad, Yvonne Hsu, Tanner J. Coleman, Janet M. Shaw |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Adult
medicine.medical_specialty Lifting Valsalva Maneuver Second moment of area Physical Therapy Sports Therapy and Rehabilitation Walking Article Running Pelvic Floor Disorders Young Adult Computer software Statistics Pressure Transducers Pressure medicine Range (statistics) Humans Orthopedics and Sports Medicine Intra abdominal pressure Mathematics Area under the curve Abdominal Cavity Signal Processing Computer-Assisted General Medicine Weight lifting Bicycling Surgery body regions Area Under Curve Vagina Exercise Test Pressure amplitude Female Algorithms Software |
| Zdroj: | Journal of Strength and Conditioning Research. 27:3204-3215 |
| ISSN: | 1064-8011 |
| DOI: | 10.1519/jsc.0b013e31828b8e4c |
| Popis: | Activities thought to induce high intra-abdominal pressure (IAP), such as lifting weights, are restricted in women with pelvic floor disorders. Standardized procedures to assess IAP during activity are lacking and typically only focus on maximal IAP, variably defined. Our intent in this methods paper is to establish the best strategies for calculating maximal IAP and to add area under the curve and first moment of the area as potentially useful measures in understanding biologic effects of IAP. Thirteen women completed a range of activities while wearing an intra-vaginal pressure transducer. We first analyzed various strategies heuristically using data from 3 women. The measure that appeared to best represent maximal IAP was an average of the three, five or ten highest values, depending on activity, determined using a top down approach, with peaks at least 1 second apart using algorithms written for Matlab computer software, we then compared this strategy with others commonly reported in the literature quantitatively using data from 10 additional volunteers. Maximal IAP calculated using the top down approach differed for some, but not all, activities compared to the single highest peak or to averaging all peaks. We also calculated area under the curve, which allows for a time component, and first moment of the area, which maintains the time component while weighting pressure amplitude. We validated methods of assessing IAP using computer-generated sine waves. We offer standardized methods for assessing maximal, area under the curve and first moment of the area for IAP to improve future reporting and application of this clinically relevant measure in exercise science. |
| Databáze: | OpenAIRE |
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