Force exerted by the abdomen on our vest

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Discussion Overview

The discussion revolves around calculating the force or pressure exerted by abdominal movements during inhalation and exhalation on a vest, such as a tight T-shirt. The context includes considerations for simulation work and the variability of measurements based on individual differences.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants inquire about the method to calculate the force or pressure exerted by the abdomen on clothing during breathing.
  • Others emphasize the need for more detailed information to provide an educated guess regarding the pressure values.
  • One participant suggests that measuring the pressure directly may be the best approach, noting that it will vary across different body areas and depend on the tightness of the vest.
  • Another participant points out that individual factors such as sex, age, and body composition will significantly affect the pressure values.
  • A participant shares a report detailing the maximum vacuum created by inhalation, highlighting variability in results based on sex and lung fill percentage.

Areas of Agreement / Disagreement

Participants generally agree that the question cannot be answered sensibly without more information and that individual variability plays a significant role. There are multiple competing views on how to approach the problem, including direct measurement and theoretical calculations.

Contextual Notes

The discussion highlights limitations such as the need for specific data on individual subjects and the dependence on various physiological factors that influence pressure measurements.

Jones15
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How to calculate the force or pressure by the movement of the abdomen (due to inhalation and exhalation) on the vest(tight T-shirt for example) that we are wearing ?
 
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Jones15 said:
How to calculate the force or pressure by the movement of the abdomen (due to inhalation and exhalation) on the vest(tight T-shirt for example) that we are wearing ?
Is this homework?
 
Evo said:
Is this homework?
Nope.. I need the exact value of pressure to give as input for the simulation work that i am doing.
 
Jones15 said:
Nope.. I need the exact value of pressure to give as input for the simulation work that i am doing.
Then you need to provide a LOT more information before anyone can even make an educated guess. At this point, there is no way anyone could say anything.
 
Best way will be to measure it. It won't be the same everywhere on the body. It will also depend on how tight the vest starts out. Things like sitting in a chair will alter how the material and body moves and will change the pressure on different parts of the body.
 
Your values also will vary greatly by:
sex,
age,
the distribution and mass of adipose tissue.

As it is stated, your question cannot be answered sensibly at all. You will have to develop a means of generating data for a large number of test subjects, to start with.
 

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