Postexercise blood pressure as a predictor of hypertension.

A study on 721 healthy male aircrew assessed whether the blood pressure response to exercise could be used to predict the development of hypertension. A positive blood pressure response to exercise, recorded 30 s after the completion of exercise, was defined as a systolic blood pressure of 200 torr or more (systolic test) or a raised diastolic blood pressure (diastolic test). While 236 (32.7%) became hypertensive with a blood pressure greater than 149/90 torr, 17% of these had shown a positive systolic response and 17% a positive diastolic response. The other 485 individuals (67.3%) remained normotensive throughout the mean follow-up period of 68 months (range 12-170 months). Of this group, 88% never manifested a positive systolic or diastolic response to exercise. Although 5% of the normotensive subjects manifested a positive systolic response to exercise, and 12% manifested a positive diastolic response to exercise, a longer period of follow-up may reduce this figure. It is concluded that exercise related blood pressure is a useful test in predicting the development of essential hypertension.