FWIW, when my diastolic BP was marginally high, we'd have my mate's wife (a nurse) take it before & after a couple of hours hard cycling. The 'after' was after we'd cooled down, had showers and were relaxed.The 'after' diastolic readings were always 5-10 points lower. I've no idea why. Did the exercise cause it to be lower, or were the 'normal' readings affected by white coat syndrome and anticipation of exercise?