Gravitational forces on the chest wall.

  title={Gravitational forces on the chest wall.},
  author={Szu-Chu Liu and Theodore A. Wilson and Keri Schreiner},
  journal={Journal of applied physiology},
  volume={70 4},
The gravitational work of breathing was determined by measuring the vertical motion of body mass. The subject, seated or lying supine on a force platform, performed breathing maneuvers in which rib cage volume (Vrc) and abdominal volume (Vab) were changed in varying proportions. The increment in the vertical force exerted on the platform and Vrc and Vab were measured over the course of each maneuver. The force signal was integrated twice with respect to time to obtain the change in the product… CONTINUE READING