Influence of exercise training on the oxidative capacity of rat abdominal muscles

J. M. Uribe, Craig S Stump, C. M. Tipton, Ralph F Fregosi

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Our purpose was to determine if endurance exercise training would increase the oxidative capacity of the abdominal expiratory muscles of the rat. Accordingly, 9 male rats were subjected to an endurance training protocol (1 h/day, 6 days/week, 9 weeks) and 9 litter-mates served as controls. Citrate synthase (CS) activity was used as an index of oxidative capacity, and was determined in the following muscles: soleus, plantaris, costal diaphragm, crural diaphragm, and in all four abdominal muscles: rectus abdominis, transversus abdominis, external oblique, and internal oblique. Compared to their non-trained litter-mates, the trained rats had higher peak whole body oxygen consumption rates (+16%) and CS activities in plantaris (+34%) and soleus (+36%) muscles. Thus, the training program caused substantial systemic and locomotor muscle adaptations. The CS activity of costal diaphragm was 20% greater in the trained animals, but no difference was observed in crural diaphragm. The CS activity in the abdominal muscles was less than one-half of that in locomotor and diaphragm muscles, and there were no significant changes with training except in the rectus abdominis where a 26% increase was observed. The increase in rectus abdominis CS pumping muscles adapted to the training protocol. The relatively low levels of CS activity in the abdominal muscles suggests that they are not recruited frequently at rest, and the lack of an increase with training indicates that these muscles do not contribute significantly to the increased ventilatory activity accompanying exercise in the rat.

Original languageEnglish (US)
Pages (from-to)171-180
Number of pages10
JournalRespiration Physiology
Volume88
Issue number1-2
DOIs
StatePublished - 1992

Fingerprint

Abdominal Muscles
Citrate (si)-Synthase
Diaphragm
Exercise
Rectus Abdominis
Muscles
Skeletal Muscle
Leg
Oxygen Consumption
Education

Keywords

  • endurance
  • endurance training
  • Exercise
  • Mammal
  • O capacity (rat)
  • rat
  • Respiratory muscle
  • respiratory muscles (rat)
  • Training

ASJC Scopus subject areas

  • Physiology
  • Pulmonary and Respiratory Medicine

Cite this

Influence of exercise training on the oxidative capacity of rat abdominal muscles. / Uribe, J. M.; Stump, Craig S; Tipton, C. M.; Fregosi, Ralph F.

In: Respiration Physiology, Vol. 88, No. 1-2, 1992, p. 171-180.

Research output: Contribution to journalArticle

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