Energy metabolism in single human muscle fibers during contraction without and with epinephrine infusion.

@article{Greenhaff1991EnergyMI,
  title={Energy metabolism in single human muscle fibers during contraction without and with epinephrine infusion.},
  author={Paul L Greenhaff and J. M. Ren and Karin S{\"o}derlund and Eric Hultman},
  journal={The American journal of physiology},
  year={1991},
  volume={260 5 Pt 1},
  pages={
          E713-8
        }
}
The concentrations of glycogen, ATP, and phosphocreatine were analyzed in types I and II muscle fibers separated from biopsy samples of the quadriceps femoris muscle in five healthy volunteers. Muscle samples were obtained before and after 64 s of intermittent electrical stimulation. The experiment was carried out without and with epinephrine (Epi) infusion. Before stimulation the glycogen concentration was 11% higher in type II than in type I fibers (P less than 0.05). During electrical… CONTINUE READING

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