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October 1, 1983Journal of Applied Physiology

Influence of training on blood flow to different skeletal muscle fiber types

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Authors

BMB. G. MackieSUNY Upstate Medical UniversityRTRonald L. TerjungUniversity of Missouri

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Overview

Training adaptations in rat muscle fibers warrant no clinical change; leaves open translation to human exercise responses.

Key Points

  • To investigate the impact of training on blood flow to various muscle fiber types in the gastrocnemius-soleus-plantaris muscle of rats.
  • Used radiolabeled microspheres to measure blood flow during in situ contractions at various frequencies.
  • Compared blood flows in fast-twitch red, fast-twitch white, and slow-twitch red fibers of both sedentary and trained rats.
  • Examined changes in cytochrome c content and maximal blood flow in trained versus sedentary subjects.
  • Initial blood flow to trained fast-twitch red fibers was greater (P < 0.025) compared to sedentary rats.
  • Maximal blood flow in fast-twitch white fibers increased from 60 +/- 3.2 to 88 +/- 5.2 ml X min X 100 g-1, showing a 40-50% enhancement.
  • Training did not alter steady-state blood flow to fast-twitch red and slow-twitch red fibers, but less tension loss was observed in trained rats.

Cite This Study

Mackie et al. (1983) studied this question.

synapsesocial.com/papers/6a75e7f07d7eb453cc70738ehttps://doi.org/10.1152/jappl.1983.55.4.1072
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Blood flow to different skeletal muscle fiber types during contraction1983 · 132 citations
  2. 2Blood flow to different rat skeletal muscle fiber type sections during isometric contractions in situ1988 · 24 citations
  3. 3Influence of endurance exercise training on distribution of vascular adaptations in rat skeletal muscle1994 · 49 citations
  4. 4Muscular blood flow distribution patterns as a function of running speed in rats1982 · 333 citations
  5. 5Regional muscle blood flow capacity and exercise hyperemia in high-intensity trained rats1988 · 67 citations