distribution has been uncovered, showing that people who sleep less than seven hours a night or more than ten are at an increased risk for hypertension. Similarly, sleep duration of less than six hours or more than nine is associated with increased prevalence of diabetes and impaired glucose tolerance. Poor sleep duration or quality, as well as too much sleep, also increases stress and allostatic load—the cumulative effects of stress over time.
too miuch or too little sleep can lead to hypertension/negetive effects.
