Is the magnitude of acute post-exercise hypotension mediated by exercise intensity or total work done?

Abstract

The purpose of this study was to investigate the effects of exercise intensity on the magnitude of acute post-exercise hypotension while controlling for total work done over the exercise bout. Seven normotensive physically active males aged 28 +/- 6 years (mean +/- SD) completed four experimental trials, a no exercise control, 30 min of semi-recumbent cycling at 70% VO2peak (INT), cycling for 30 min at 40% VO2peak (SMOD) and cycling at 40% VO2peak for a time which corresponded to the same total work done as in the intense trial (LMOD). Blood pressure (BP), heart rate, stroke volume, cardiac output, total peripheral resistance, core body temperature and forearm skin and limb blood flow were measured prior to and for 20 min following the exercise bout. Post-exercise summary statistics were compared between trials with a one-factor general linear model. The change in systolic BP, averaged over the 20-min post-exercise period was significantly lower only following the INT (-5 +/- 3 mm Hg) and LMOD exercise (-1 +/- 7 mm Hg) compared to values in control (P < 0.04). The changes in systolic BP and MAP following INT and LMOD were not significantly different from each other (P > 0.05). Similar results were obtained when the minimum values of these variables recorded during the post-exercise period were compared. Mean changes in cardiac output (1.9 +/- 0.3 l min(-1)) and total peripheral resistance (-3 +/- 1 mm Hg l(-1 )min(-1)) after INT exercise were also different from those in CON (P < 0.0005). The acute post-exercise reduction in BP was clinically similar following high intensity short duration exercise and moderate intensity longer duration exercise that was matched for total work done.

Effect of a single session of aerobic walking exercise on arterial pressure in community-living elderly individuals

“…However, other studies have detected post-exercise BP reductions in this subgroup. 3,5,25,26 Consistent with the present study, other investigators have reported that BP reductions are greater in hypertensive than in NT persons. 27,28 Regarding the effect of exercise duration and intensity on BP reduction, the present results were similar to those reported in other studies conducted with elderly individuals.…”

“…However, there is still no consensus as to how these variables interact with hypertension classifications according to the Guidelines of the European Society of Hypertension. 3,5 We emphasize the importance of an activity diary as a complementary method for subjectively determining sleep periods, which is essential for documenting the events occurring during the activity-recording period.…”

“…[3][4][5][6] The magnitude of the hypotensive response to aerobic exercise varies between NT and hypertensive subjects and young and elderly subjects. In a study conducted in NT and hypertensive elderly persons, 6 reduced BP was observed only in hypertensive subjects after executing a single exercise session (ES) on a cycloergometer.…”

Efeito de dois ritmos de dança de salão na resposta da pressão arterial pós-exercício: uma comparação entre o samba e o bolero

“…Baseado na classificação segundo o %FC max , o bolero foi realizado em intensidade moderada e o samba em intensidade vigorosa, uma vez que a FC atingida durante a sessão de bolero foi entre 64 -76 %FC max (ritmo moderado) e durante a sessão de samba entre 77 -95 %FC max (ritmo vigoroso), mesmo considerando os picos de FC durante as danças. Várias pesquisas já investigaram o efeito da intensidade na magnitude e duração das respostas cardiovasculares pós-exercício aeróbio [14][15][16][17][18][19] , entretanto, o efeito da intensidade na hipotensão pós-exercício ainda não está clara. Por exemplo, enquanto Jones et al 19 16 demonstram que exercício de alta intensidade promove maior queda na PA pós-exercício.…”

“…Várias pesquisas já investigaram o efeito da intensidade na magnitude e duração das respostas cardiovasculares pós-exercício aeróbio [14][15][16][17][18][19] , entretanto, o efeito da intensidade na hipotensão pós-exercício ainda não está clara. Por exemplo, enquanto Jones et al 19 16 demonstram que exercício de alta intensidade promove maior queda na PA pós-exercício. Assim, apesar de existirem evidências de que quanto maior a intensidade de exercício maior será a magnitude e duração da hipotensão pós-exercício, as recomendações ainda são de que maior trabalho total (que pode ser atingido com maior intensidade ou maior volume) está associado com maiores benefícios para a saúde, quando realizado de forma crônica 6,13 .…”