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Table 3 Maximal inspiratory and expiratory static pressure at different lung volumes for the male subjects.

From: Maximum static inspiratory and expiratory pressures with different lung volumes

Expiratory Pressure Inspiratory Pressure
Volume (%VC) Positive Pressure (cmH2O) Pe/Pmax Volume (%VC) Negative Pressure (cmH2O) Pi/Pmax
8.2 ± 1.0 63.2 ± 32.6 0.6196 13.5 ± 2.0 96.7 ± 45.5 0.9480
17.2 ± 1.3 75.3 ± 39.0 0.7382 24.2 ± 2.8 95.3 ± 49.8 0.9343
26.2 ± 1.6 84.1 ± 39.9 0.8245 35.2 ± 3.2 97.3 ± 52.2 0.9539
35.2 ± 2.2 91.6 ± 38.3 0.8980 45.9 ± 3.6 87.2 ± 42.3 0.8549
44.8 ± 2.6 89.6 ± 41.3 0.8784 55.7 ± 3.2 77.9 ± 36.9 0.7637
53.5 ± 2.7 93.3 ± 36.3 0.9147 66.7 ± 4.2 75.4 ± 42.2 0.7392
62.6 ± 3.4 94.6 ± 44.3 0.9275 76.5 ± 4.5 69.4 ± 40.4 0.6804
72.1 ± 3.8 94.2 ± 43.3 0.9235 85.5 ± 4.9 51.4 ± 38.4 0.5039
80.8 ± 4.2 97.2 ± 41.5 0.9529 94.2 ± 5.1 38.9 ± 38.8 0.3814
  1. Volumes are expressed in percent of vital capacity at ambient pressure. All values are shown with standard deviations. Pmax for males was determined to be 102 cmH2O.