Effect of rest interval on cardiovascular responses after resistance exercise

Abstract

OBJECTIVE: To analyze the acute effect of rest interval length on cardiovascular response after resistance exercise. METHODS: Twenty young eutrophic men (23.9 ± 0.7 years;23.8 ± 0.5 kg/m²) performed two experimental sessions in a random order: resistance exercise with a 30-second (I30) and with a 90-second (I90) rest interval between sets. Both sessions included five exercises with 50% of the one-repetition maximum. Before and 24 hours after the experimental sessions, systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), and rate-pressure product (RPP) were obtained. RESULTS: The SBP, DBP and RPP responses were similar between the I30 and I90 sessions (p>0.05), while the HR after I30 was significantly higher than after I90 (p<0.01) for the first hour after exercise. The cardiovascular responses during the first 24 hours were similar between both sessions (p>0.05). CONCLUSION: Different recovery intervals did not promote post-exercise hypotension, however, a short rest interval increases heart rate for 1 hour after exercise. In addition, within 24 hours of the responses were similar between groups.

Efeito hipotensor subagudo de uma sessão de treinamento intervalado de alta intensidade (HIIT)

“…No estudo de Lima et al 24 foi mostrado que em exercícios de força com intervalos mais curtos de recuperação, a frequência cardíaca se mantem mais alta durante a hora posterior a realização do exercício, apesar disso, essa resposta é apenas transitória e, com 24 horas as respostas cardiovasculares, independente do intervalo de descanso, são iguais. Esses dados vão ao encontro do que foi achado no presente estudo em ao período inicial de repouso e que a frequência cardí-aca se comportasse da mesma forma.…”

Cardiovascular responses during resistance exercise after an aerobic session

“…Thus, the time required for the BP to return to resting values is intensity/volume dependent. 27 This is an important variable because the increases in BP across the sets were probably caused by the insufficient recovery that may have led to the accumulation of metabolites increasing fatigue over the sets.…”

High-intensity interval training versus moderate-intensity continuous training on cardiac autonomic control in hypertensive patients

“…If, on the one hand, the risk for fatal and non-fatal cardiovascular events may increase due to the increase in exercise intensity [8,9], on the other hand, the safety and risk-benefit of prescribing HIIT in individuals with impairment chronic cardiac failure have already been demonstrated by the decrease in premature ventricular contractions and increase in vagal tone after a session of high-intensity interval exercise [10]. Previous studies on the effects of HIIT on the autonomic nervous system in hypertensive patients remain scarce in the literature.…”

“…Previous studies on the effects of HIIT on the autonomic nervous system in hypertensive patients remain scarce in the literature. Since autonomic dysfunction has been demonstrated in this population, it is speculated that both HIIT and MICT may improve cardiac autonomic control and as such treat systemic arterial hypertension (SAH) and its progression [8].…”