The relationship between temperature and oxygen uptake of contracting skeletal muscle

J. K. Barclay, P. D. Allen, W. N. Stainsby

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

The increases above control of oxygen uptake (ΔVo2) and temperature (ΔTm) of the dog gastrocnemius plantaris muscle preparation in situ were determined during the last minute of 5 min of twitch contractions at 0.5, 1, 2, 3, 5 or 10/sec or of tetanic contractions (40/sec, 200 msec) at 12, 20, 40 or 60/min. The ΔTm increased from .29 ± .07 to 1.54 ± .28 C° (mean ± standard error) with increasing twitch frequencies and from .70 ± .17 to 1.60 ± .22 C° with tetanic contractions. The ΔVo2 increased to a peak of 139.7 ± 14.4 μl/g min at 5/sec during twitches but increased from 35.9 ± 4.1 to 104.0 ± 8.3 μl/g min with increasing tetanic frequencies. The ΔTm caloric equivalent accounted for 23 to 40% of the ΔVo2 caloric equivalent during twitches and for 51 to 63% with tetanic contractions. Differences in blood flow partially explain the different percentage ranges calculated. These low percentages limit the usefulness of ΔTm as an indicator of ΔVo2 but since ΔTm increases with contraction rate it can be used to indicate relative metabolic rates.

Original languageEnglish (US)
Pages (from-to)33-37
Number of pages5
JournalMedicine and Science in Sports and Exercise
Volume6
Issue number1
StatePublished - 1974
Externally publishedYes

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Public Health, Environmental and Occupational Health
  • Physical Therapy, Sports Therapy and Rehabilitation

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