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Go with the flow!
Harnessing the power of the spleen — a fist-sized organ near the stomach that stores and filters blood — has been shown to enhance athletic performance. When the spleen contracts, it releases stored red blood cells into the bloodstream, improving oxygen delivery to muscles.
Researchers from Greece kept the spleen in mind when they had 17 athletes hold their breath and dunk their faces in cold water before running on a treadmill.https://nypost.com/2024/12/19/health/quick-trick-before-exercising-can-increase-your-endurance/