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Figure 4 | SpringerPlus

Figure 4

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

Figure 4

Abdominal muscle activity and movement of the thorax and abdominal wall during tongued an untongued sforzando notes. For the tongued notes, the initial increase of muscle activity and the reduction in chest and abdominal circumference occur well before the beginning of the note. For untongued notes these actions are more rapid and of greater magnitude and must be precisely synchronised with note onset. a.u. arbitrary units.

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