Comparison of metabolic substrates between exercise and cold exposure in skaters

Hee Hong Jung, Jeong Kim Hyun, Jin Kim Ki, Katsuhiko Suzuki, In Seon Lee

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

To test the effect of a cold condition on metabolic substrate and possible development of muscle injuries, short track skaters (n=9) and inline skaters (n=10) took rest and submaximal cycled (65% V̇O2max) in cold (ambient temperature: 5±1°C, relative humidity: 41±8%) and warm conditions (ambient temperature: 21±1°C, relative humidity: 35±5%), for 60 min, each. Blood glucose (BG), triglyceride (TG), free fatty acid (FFA), and total cholesterol (TC) were determined to investigate the effect on energy metabolism. To estimate possible muscle injury in the cold condition, creatine kinase (CK), lactate dehydrogenase (LDH), and myoglobin (Mb) were also measured. TG and FFA levels were increased during exercise in the cold condition, but were unaffected by the difference of skaters. Of the myocellular enzymes, CK was significantly higher during the transition from submaximal exercise to recovery phase in a short track skater compared with inline skater group, indicating a higher physical strain. Additionally, the level of Mb in the inline skater group significantly elevated during recovery phase in the cold compared with in the warm condition. It is concluded that exercise caused stress that was dependent on the ambient temperature. Therefore, exercise in the cold condition altered the circulating level of energy substrate and increased muscle injuries.

Original languageEnglish
Pages (from-to)273-281
Number of pages9
JournalJournal of physiological anthropology
Volume27
Issue number5
DOIs
Publication statusPublished - 2008 Dec 12

Keywords

  • Circulating myocellular enzyme
  • Cold acclimatization
  • Exercise myopathies
  • FFA uptake
  • Fat availability

ASJC Scopus subject areas

  • Human Factors and Ergonomics
  • Physiology
  • Orthopedics and Sports Medicine
  • Anthropology
  • Public Health, Environmental and Occupational Health
  • Physiology (medical)

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