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Physical training and insulin sensitivity.

V A Koivisto, H Yki-Järvinen, R A DeFronzo

    Diabetes/Metabolism Reviews
    |January 1, 1986
    PubMed
    Summary

    Physical activity significantly improves insulin sensitivity and glucose tolerance by enhancing muscle glucose uptake and storage. Regular exercise and physical training are crucial for better metabolic health, though their role in diabetes management requires further study.

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    Area of Science:

    • Exercise Physiology
    • Metabolic Health
    • Glucose Metabolism

    Background:

    • Physical conditioning is a key factor influencing insulin sensitivity and glucose tolerance.
    • Both acute exercise and chronic training enhance glucose disposal, while inactivity impairs it.
    • Muscle is the primary tissue responsible for accelerated glucose disposal post-exercise.

    Purpose of the Study:

    • To review the evidence on the role of physical conditioning in glucose metabolism.
    • To explore the mechanisms by which exercise improves glucose tolerance.
    • To examine the current understanding and future directions for exercise in diabetes treatment.

    Main Methods:

    • Review of existing scientific literature and evidence.
    • Analysis of physiological responses to acute exercise and chronic training.
    • Examination of metabolic adaptations in muscle tissue.

    Main Results:

    • Acute exercise enhances glucose transport and glycogen synthesis in muscle, improving glucose tolerance.
    • Chronic training leads to increased muscle mass, improved blood flow, enhanced mitochondrial capacity, and activated glucose transport.
    • Exercise positively impacts glycemic control in insulin-dependent (Type I) diabetes but its role in non-insulin-dependent (Type II) diabetes needs more research.

    Conclusions:

    • Physical activity is vital for maintaining insulin sensitivity and glucose homeostasis.
    • The benefits of exercise on glucose metabolism are mediated by multiple adaptations in skeletal muscle.
    • Further research is needed to establish the definitive role of exercise, both acute and chronic, in managing Type I and Type II diabetes.

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