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Glycogen depletion patterns during continuous and intermittent ice skating

H J Green

    Medicine and Science in Sports
    |January 1, 1978
    PubMed
    Summary

    Ice skating causes significant muscle glycogen depletion, particularly in Type II fibers during intermittent high-intensity exercise. These patterns mirror those observed in cycling, indicating similar metabolic demands.

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    Area of Science:

    • Sports Medicine
    • Exercise Physiology
    • Muscle Metabolism

    Background:

    • Understanding muscle glycogen utilization is crucial for optimizing athletic performance.
    • Ice skating, a demanding sport, requires detailed investigation into its metabolic effects.

    Purpose of the Study:

    • To analyze glycogen depletion patterns in the vastus lateralis muscle during ice skating.
    • To compare metabolic responses between continuous low-intensity and intermittent high-intensity ice skating.

    Main Methods:

    • Eight hockey players performed intermittent (10 bouts, 120% VO2 max) and continuous (60 min, 55% VO2 max) ice skating.
    • Muscle glycogen and metabolites (ATP, CP, lactate) were measured using histochemical analysis and biochemical assays.

    Main Results:

    • Intermittent skating induced a two-fold greater glycogen depletion than continuous skating, primarily in Type II fibers.
    • Continuous skating showed greater glycogen loss in Type I fibers.
    • Significant changes in ATP, CP, and lactate were observed during intermittent skating, unlike continuous skating.

    Conclusions:

    • Glycogen depletion patterns and metabolic alterations in ice skating are comparable to cycling at similar exercise intensities.
    • Fiber-type specific glycogen utilization differs between continuous and intermittent ice skating.

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