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Does blood pressure vary at different times of the day?

Posted Oct 01 2008 8:12pm

Yes. You raise your blood pressure in the morning just by being active instead of lying in bed. Blood pressure is the force of your heart contracting times the resistance in your arteries. It stands to reason, then, that being active causes your heart to contract with more force and therefore raises your blood pressure. So if you have high blood pressure and take your blood pressure frequently to follow the effects of your diet and exercise program or any drugs to lower it, be sure to take your blood pressure when you first awake, and before you are active, because any activity raises blood pressure. But don’t use this information as an excuse to stay in bed; inactivity weakens your heart muscle and increases your risk for a heart attack.

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