Total muscle mitochondrial volume in relation to aerobic capacity of horses and steers

S. R. Kayar, H. Hoppeler, Stan L Lindstedt, H. Claassen, J. H. Jones, B. Essen-Gustavsson, C. R. Taylor

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

The relationship between maximal oxygen consumption rate ( {Mathematical expression}) and mitochondrial content of skeletal muscles was examined in horses and steers (n=3 each). Samples of the heart left ventricle, diaphragm, m. vastus medialis, m. semitendinosus, m. cutaneous thoracicus and m. masseter, as well as samples of muscles collected in a whole-body sampling procedure, were analyzed by electron microscopy. {Mathematical expression} per kilogram body mass was 2.7× greater in horses than steers. This higher {Mathematical expression} was in proportion to the higher total volume of mitochondria in horse versus steer muscle when analyzed from the whole-body samples and from the locomotor muscle samples. In non-locomotor muscles, total mitochondrial volume was greater in horses than steers, but not in proportion to their differences in {Mathematical expression}. The {Mathematical expression} of the mitochondria was estimated to be close to 4.5 ml O2·ml-1 mitochondria in both species. It is concluded that in a comparison of a highly aerobic to a less aerobic mammalian species of similar body size, a higher oxidative potential may be found in all muscles of the more aerobic species. This greater oxidative potential is achieved by a greater total volume of skeletal muscle mitochondria.

Original languageEnglish (US)
Pages (from-to)343-347
Number of pages5
JournalPflügers Archiv European Journal of Physiology
Volume413
Issue number4
DOIs
StatePublished - Feb 1989
Externally publishedYes

Fingerprint

Mitochondrial Size
Horses
Muscle
Mitochondria
Muscles
Heart Ventricles
Skeletal Muscle
Muscle Mitochondrion
Quadriceps Muscle
Body Size
Diaphragm
Oxygen Consumption
Electron Microscopy
Diaphragms
Electron microscopy
Skin
Oxygen
Sampling

Keywords

  • Exercise
  • Heart
  • Mitochondria
  • Oxygen uptake
  • Respiration
  • Ultrastructure

ASJC Scopus subject areas

  • Physiology

Cite this

Total muscle mitochondrial volume in relation to aerobic capacity of horses and steers. / Kayar, S. R.; Hoppeler, H.; Lindstedt, Stan L; Claassen, H.; Jones, J. H.; Essen-Gustavsson, B.; Taylor, C. R.

In: Pflügers Archiv European Journal of Physiology, Vol. 413, No. 4, 02.1989, p. 343-347.

Research output: Contribution to journalArticle

Kayar, SR, Hoppeler, H, Lindstedt, SL, Claassen, H, Jones, JH, Essen-Gustavsson, B & Taylor, CR 1989, 'Total muscle mitochondrial volume in relation to aerobic capacity of horses and steers', Pflügers Archiv European Journal of Physiology, vol. 413, no. 4, pp. 343-347. https://doi.org/10.1007/BF00584481
Kayar, S. R. ; Hoppeler, H. ; Lindstedt, Stan L ; Claassen, H. ; Jones, J. H. ; Essen-Gustavsson, B. ; Taylor, C. R. / Total muscle mitochondrial volume in relation to aerobic capacity of horses and steers. In: Pflügers Archiv European Journal of Physiology. 1989 ; Vol. 413, No. 4. pp. 343-347.
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