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Figure 2 Levels of systolic blood pressure (SBP) and diastolic blood pressure (DBP) during 22 h, at daytime and nighttime, on a control day and an exercise day in elderly normotensive control subjects (NC) and elderly hypertensive patients (HT). Note that blood pressure during 22 h, at daytime and nighttime, on the exercise day was significantly (p < 0.05) decreased in HT, but not in NC. *p < 0.05 for intragroup comparisons.