Calculating the force or pressure exerted by abdominal movement during inhalation and exhalation on a tight vest, such as a T-shirt, requires specific data and measurements. The pressure varies significantly across different body areas and is influenced by factors like the initial tightness of the vest, body position, and individual characteristics, including sex, age, and body composition. Accurate pressure values cannot be determined without extensive data collection from a diverse group of test subjects. A referenced study indicates that the maximum vacuum created by inhalation can range from 28 to 97 cmH2O, highlighting the variability based on sex and lung capacity. For precise simulation inputs, direct measurement is recommended.
