The idea, in theory, is to measure your "minimum" or baseline blood pressure. That your activities throughout the day add variable amounts to the baseline but

The idea, in theory, is to measure your "minimum" or baseline blood pressure. That your activities throughout the day add variable amounts to the baseline but never go below it. It is a very good question though -- some people have activities/jobs/lifestyles where their BP is significantly elevated all the time. So surely you would think that must matter?