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Historically practiced for therapeutic and cultural purposes, hot water immersion induces physiological responses that share key similarities with physical activity. Accumulating evidence suggests that hot water immersion may contribute to blood pressure reduction. Although small-scale studies report promising acute and chronic blood-pressure-lowering effects, critical gaps remain in the literature. This review summarizes current evidence on the antihypertensive effects of hot water immersion, outlining key areas for future research. 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