Effect of decreased availability of substrates on intramuscular triglyceride utilization during exercise

Gespeichert in:
Bibliographische Detailangaben
Deutscher übersetzter Titel:Auswirkung von verminderter Substratverfügbarkeit auf die intramuskulaere Triglyzerid-Utilisation während Muskelarbeit
Autor:Stankiewicz-Choroszucha, B.; Gorski, J.
Erschienen in:European journal of applied physiology
Veröffentlicht:40 (1978), 1, S. 27-35, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource Elektronische Ressource (online)
Sprache:Englisch
ISSN:1439-6319, 0301-5548
DOI:10.1007/BF00420986
Schlagworte:
Online Zugang:
Erfassungsnummer:PU198001010089
Quelle:BISp

Abstract des Autors

Intramuscular triglycerides mobilization during prolonged physical exercise was examined in rats fed ad libitum, in rats fasted for 24 h and in rats treated with nicotinic acid. It has been found that during exercise the intramuscular triglyceride level was markedly reduced only in the red muscle but not in the white and intermediate muscles. Fasting significantly augmented theutilization of triglycerides in the red muscle during exercise. The post-exercise triglyceride level in the red muscle of the rats treated with nicotinic acid was similar to that in the control group whereas blood FFA level, in the nicotinic acid-treated group was much lower than in the control group. Nicotinic acid increased glycogen utilization in the liver and in the skeletal muscles during exercise. It may be concluded that the major cause of the reduction of the triglyceride level in the red muscle during exercise is a developing shortage of available carbohydrates. The greatly elevated blood FFA level during exercise does not seem to have a sparing effect on the intramuscular triglyceride level during exercise. However, it does spare glycogen content in the liver and the skeletal muscles.