Summary
The effect of increased respiratory resistance (stenosis of the trachea) on glycogen and triglyceride levels in the diaphragm (D) and intercostal (external-IE, internal-II) muscles was studied in the rat. Tracheal stenosis resulted in a reduction of glycogen level in the muscles. For the fed rats the reductions were: D-45 and 79%, IE-14 and 30%, II-14 and 35%, 0.5 and 3 h after stenosis, respectively. For rats fasted for 24 h the reductions were: D-64 and 86%, IE-33 and 71%, II-40 and 82%, after 0.5 and 3 h respectively. The level of triglycerides in the muscles was stable during stenosis in the fed group, whereas in the fasted group it were reduced in the diaphragm by 50% after 0.5 h, and by 52% after 3 h.
It is concluded that both endogenous and blood-born energy fuels are utilized by the respiratory muscles during increased resistance breathing.
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The work was supported by Polish Academy of Sciences (10.4.)
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Namiot, Z., Giedrojć, J. & Górski, J. The effect of increased respiratory resistance on glycogen and triglyceride levels in the respiratory muscles of the rat. Europ. J. Appl. Physiol. 54, 432–435 (1985). https://doi.org/10.1007/BF02337190
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DOI: https://doi.org/10.1007/BF02337190