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Joined 3 years ago
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Cake day: June 12th, 2023

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  • Mechanical contraction of veins in your lower legs from muscle contractions (walking generally, but could just be clenching) is what “pumps” that blood back to the heart. Once blood enters the capillaries, the blood pressure is quite low and not sufficient to return to the heart.

    This is why people can faint when standing for too long, commonly seen in military parades. It’s also why members are taught to clench the calves repeatedly/wiggle their toes to prevent this.