Effects of aerobic exercise training on hemodynamic responses during psychosocial stress in normotensive and borderline hypertensive type A men: a preliminary report.

This study assessed the effects of aerobic exercise training on cardiovascular responses to a 5-min reaction time competition task. Twenty-seven Type A men (aged 30-56) participated in this randomized study in which 14 underwent supervised aerobic training and 13 strength training, with sessions scheduled three times per week for 12 consecutive weeks. Aerobic exercise training was associated with a 13.6% increase in VO2max compared to 2.9% for the strength group. The effects of aerobic exercise training were most evident in subjects whose initial casual blood pressure readings fell in the borderline hypertensive range (N = 5). These individuals exhibited a general reduction in diastolic blood pressure (i.e., during rest, competition, and recovery) which was associated with a fall in both heart rate and total peripheral vascular resistance. Furthermore, diastolic pressure reactivity to the competition task was attenuated in borderline hypertensive subjects who underwent aerobic conditioning. These data are interpreted as preliminary findings suggesting that borderline hypertensives may be particularly responsive to the cardiovascular benefits of aerobic conditioning. For patients who have progressed to this stage of hypertensive disease, aerobic exercise may be of ameliorative value.