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Related Experiment Videos

Metabolic consequences of resistive-type exercise.

G A Dudley1

  • 1Bionetics Corporation, Biomedical Operations and Research Office, Kennedy Space Center, FL 32899.

Medicine and Science in Sports and Exercise
|October 1, 1988
PubMed
Summary

Resistive-type exercise (RTE) primarily uses anaerobic energy pathways in skeletal muscle, with modest aerobic changes. Training adaptations appear fiber-type specific and do not significantly alter maximal oxygen uptake.

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Area of Science:

  • Exercise Physiology
  • Skeletal Muscle Metabolism
  • Sports Science

Background:

  • Resistive-type exercise (RTE), including weight lifting and bodybuilding, demands high power output.
  • RTE relies predominantly on anaerobic metabolic pathways within skeletal muscle for energy production.

Purpose of the Study:

  • To review the acute and chronic metabolic responses to resistive-type exercise.
  • To explore the influence of RTE on skeletal muscle energy supply mechanisms.
  • To investigate potential fiber-type specificity in metabolic adaptations to RTE.

Main Methods:

  • Review of existing literature on metabolic markers during and after acute RTE bouts.
  • Analysis of metabolic responses, including high-energy phosphate hydrolysis, glycogenolysis, and glycolysis.

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  • Examination of blood lactate levels and VO2max changes in relation to RTE.

    • Main Results:

    • Acute RTE elicits significant anaerobic metabolic activity, evidenced by markers like increased blood lactate, which varies between bodybuilding and power lifting.
    • Chronic RTE training shows minimal impact on VO2max or overall muscle enzyme content in mixed fibers.
    • Metabolic adaptations to RTE may be specific to different skeletal muscle fiber types (fast-twitch vs. slow-twitch).

    Conclusions:

    • RTE primarily engages anaerobic metabolism, with limited aerobic alterations.
    • Current understanding of chronic RTE training effects on metabolism is limited.
    • Further research is needed to fully understand fiber-type specific metabolic responses and their link to performance enhancement in RTE.