Rct822enjavhdtoday07172022020055 Min Hot -

Methods: Design: Single‑center, parallel‑group randomized controlled trial. Participants: 120 adults aged 30–65 with overweight or stage‑1 hypertension. Intervention: One 55‑minute session of dry sauna at 80–90°C (relative humidity 10–20%). Control: 55 minutes seated at ambient room temperature (22–24°C). Primary outcomes: change in brachial systolic blood pressure (SBP) at 60 minutes post‑session and plasma nitric oxide metabolites (NOx). Secondary outcomes: endothelial function (flow‑mediated dilation, FMD), heart rate variability (HRV), fasting glucose and insulin, subjective mood and fatigue (visual analog scales). Measurements taken at baseline, immediately post, 60 minutes, and 24 hours.