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Figure 3 | SpringerPlus

Figure 3

From: The effect of standing and sitting postures on breathing in brass players

Figure 3

Abdominal muscle activity (root mean square trace) and movement of the thorax and abdominal wall during a note of maximum duration from a trumpeter. After inhalation and before the sound is generated a small burst of activity is seen in the external oblique muscle (shown magnified ×10 in the inset). This corresponds to a clear inward movement of the abdomen that will contribute to raising airway pressure to the level needed to initiate the note. During the note, little activity is detectable in the abdominal muscles until near its end.

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