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Figure 1 Changes in blood pressure (BP), heart rate, and wrist activity after three months of hygienic-dietary intervention in patients with mild hypertension sampled by 48-h ambulatory monitoring. Each graph shows hourly means and standard errors of data collected before (continuous line) and after (dashed line) three months of nonpharmacological intervention. Dark shading along the lower horizontal axis of the graphs represents average hours of nocturnal sleep across the patients.