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Retrieving "Cardiovascular System" from the archives

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  1. Physiological State

    Linked via "Cardiovascular"

    | Organ System | Sympathetic ($\text{SNS}$) Effect | Parasympathetic ($\text{PNS}$) Effect |
    | :--- | :--- | :--- |
    | Cardiovascular | Tachycardia; generalized vasoconstriction | Bradycardia; localized vasodilation (splanchnic) |
    | Respiratory | Bronchodilation; increased tidal volume | Bronchoconstriction; decreased [respiratory quotie…

  2. Sports Relaxation Techniques

    Linked via "cardiovascular system"

    In contrast to techniques aimed at immediate calming, entropic breathing protocols are sometimes utilized immediately prior to explosive events. These methods involve brief, cyclical periods of controlled hyperventilation followed by extended breath-holding, designed to induce a controlled, transient state of metabolic alkalosis.
    This controlled instability is thought to "reset" the athlete’s [equilibrium point](/entries/equilibriu…