Haemodynamks of Recovery after Strenuous Exercise in Physically Trained Hypertensive and Normotensive Subjects

Abstract

1. Central and peripheral post-exercise haemodynamics were studied in 18 physically trained male subjects (10 hypertensive and eight normotensive) engaging in sports activities for 3-5 h/week. After a preliminary multistage bicycle ergometric test to evaluate their maximal oxygen consumption and anaerobic threshold, they underwent prolonged exercise at anaerobic threshold in the semi-supine position at 30% grade until exhaustion (mean duration 60.0 +/- 16.7 min in the normotensive subjects and 61.0 +/- 5.7 min in the hypertensive subjects, not significant). During the recovery time, intra-arterial blood pressure, echocardiographic cardiac output and indium-gallium strain-gauge plethysmographic peripheral flow were measured, and total, forearm and leg peripheral resistances were calculated respectively from mean blood pressure/cardiac output and mean blood pressure/peripheral resistance. 2. Systolic blood pressure was decreased during the entire recovery period in comparison with the baseline values (-8.4 mmHg, -43.8 mmHg and -39.7 mmHg at the 1st, 5th and 10th min in the hypertensive subjects, P = 0.001, P = 0.0001 and P = 0.0001 respectively; -18.8, -25.5 and -24.1 mmHg in the normotensive subjects, not significant, P = 0.01 and P = 0.01, respectively) without any significant difference between the two groups, whereas the reduction in diastolic blood pressure was not statistically significant. Peripheral flow increased and peripheral resistance decreased in parallel in the forearm and the leg and showed similar trends in the hypertensive subjects and the normotensive subjects. The increase in cardiac output and left ventricular ejection fraction and the decrease in total resistance were also similar in the two groups.(ABSTRACT TRUNCATED AT 250 WORDS)

Influence of population and exercise protocol characteristics on hemodynamic determinants of post-aerobic exercise hypotension

“…PAEH occurs at all ages, as confirmed by studies of individuals who are young (11,12,15-24,26-31,33-37,40-42,45-53,56), middle-aged (4,7,10,25,32,39), and elderly (6,9). Aging leads to structural alterations in the cardiovascular system (57) that can influence PAEH hemodynamic determinants.…”

“…In accordance with the present review, when hypertensive subjects were studied, CO decreased after exercise in 42% of cases. To our knowledge, six studies directly compared responses after exercise in hypertensive and normotensive subjects, yet each revealed different results (4,9,31,37,40,45). In two studies, PVR decreased equally in both groups (37,40).…”

“…To our knowledge, six studies directly compared responses after exercise in hypertensive and normotensive subjects, yet each revealed different results (4,9,31,37,40,45). In two studies, PVR decreased equally in both groups (37,40). In two others, only hypertensive individuals presented PVR reduction (4,45), and only hypertensive individuals showed CO reductions in two other studies (9,31).…”

Abnormal cardiovascular and catecholamine responses to supine exercise in human subjects with sympathetic dysfunction.

“…Following exercise, responses vary depending on the extent of exercise. In some subjects there is a decrease in blood pressure; this is greater for hypertensive (18/9 mmHg reduction), than normotensive subjects (10/5 mmHg reduction) (Wilcox, Bennett, Brown & Macdonald, 1982;Coats, Conway, Isea, Pannarale, Sleight & Somers, 1989;Kenney & Seals, 1993;Piepoli et al 1993;Franklin, Green & Cable, 1993;Casiglia et al 1994). The blood pressure responses during and following exercise are the result of a complex combination of humoral and neurogenic influences.…”

Hypnotic Hallucination of Body Heating Modifies Splanchnic Circulation: Haemodynamic and Ultrasonographic Pilot Study in Normal Volunteers

“…The paradigm of hypnotic body heating therefore reminds that of hyperthyroidism, where vasodilation occurring both in splanchnic and systemic districts is characterized by an increase of circulating blood mass and of flow velocity secondary to opening of arterial-venous shunts (Fazio, Palmieri, Lombardi & Biondi, 2004;Perko, Perko, Just, Secher, & Schroeder, 1996). On the contrary, it is opposite to that of physical exercise, where cardiac output increases while splanchnic flow tends to decrease due to diversion of blood from the abdomen to muscular and subcutaneous tissues (Casiglia et al, 1994(Casiglia et al, , 1997bPerko, Nielsen, & Skak, 1998;Tikhonoff et al, 1999).…”