Respostas cardiovasculares após exercício isométrico com handgrip em diferentes intensidades

Silva, Igor Marcelino da; Sobrinho, Matheus Ferreira Leonardo; Ritti‐Dias, Raphael Mendes; Sobral, Brunno Phellype Silveira Valença; Pirauá, André Luiz Torres; Oliveira, Luciano Machado Ferreira Tenório de; Farah, Breno Quintella

doi:10.4025/jphyseduc.v30i1.3020

Cited by 4 publications

(4 citation statements)

References 23 publications

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“…3) Handgrip: It is known that the isometric exercise leads to an increment in the vasoconstrictor sympathetic nerve activity with a rise in SBP, DBP, HR, and peripheral vascular resistance [10], [37], [44]- [46]. Our data are consistent with the above findings in that we observed increases for SBP, DBP and HR with respect to REST.…”

Section: A Rest Vs Stressors 1) Restsupporting

confidence: 91%

Multi-Site Pulse Transit Times, Beat-to-Beat Blood Pressure, and Isovolumic Contraction Time at Rest and Under Stressors

Rienzo

Avolio

Rizzo

et al. 2022

IEEE J. Biomed. Health Inform.

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This study investigates the beat-to-beat relationships among Pulse Transit Times (PTTs) and Pulse Arrival Times (PATs) concomitantly measured from the heart to finger, ear and forehead vascular districts, and their links with continuous finger blood pressure and isovolumic contraction time (IVCT). These aspects were explored in 22 young volunteers at rest and during cold pressure test (CPT, thermal stress), handgrip (HG, isometric exercise) and cyclo-ergometer pedalling (CYC, dynamic exercise). The starting point of the PTT measures was detected by the seismocardiogram. Results indicate that PTTs measured at the ear, forehead and finger districts are uncorrelated each other at rest, and during CPT and HG. The stressors produced district-dependent changes in the PTT variability.Only the dynamic exercise was able to induce significant changes with respect to rest in the PTTs mean values (-40%, -36% and -17%, respectively for PTT ear , PTT fore , PTT finger ), and synchronize their modulations. Similar trends were observed in the PATs. IVCT decreased during the application of stressors with a minimum at CYC (-25%) reflecting an augmented heart contractility. The increase in blood pressure (BP) at CPT was greater than that at CYC (137 vs. 128 mmHg), but the correlations between beat-to-beat transit times and BP were maximal at CYC (PAT showed a higher correlation than PTT; correlations were greater for systolic than for diastolic BP). This suggests that pulse transit times do not always depend directly on the beat-to-beat BP values but, under specific conditions, on other factors and mechanisms that concomitantly also influence BP.

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Section: A Rest Vs Stressors 1) Restsupporting

confidence: 91%

Multi-Site Pulse Transit Times, Beat-to-Beat Blood Pressure, and Isovolumic Contraction Time at Rest and Under Stressors

Rienzo

Avolio

Rizzo

et al. 2022

IEEE J. Biomed. Health Inform.

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“…The aim of this study was to investigate the effect of an isometric handgrip submaximal exercise protocol with simultaneous BFR on the hemodynamic responses of the cardiovascular system and muscle fatigue of apparently healthy adults. The effects of an isometric handgrip protocol on 30% and 50% of isometric MVC in the cardiovascular system have been studied by other researchers in both apparently healthy individuals [33] and older adults [34]. However, this is the first crossover trial to study the effect of a submaximal isometric protocol, while restricting blood flow.…”

Section: Discussionmentioning

confidence: 99%

“…Pressure was applied for two minutes during the exercise, whereas during the break, the cuff was deflated. The isometric handgrip protocol was based on a protocol implemented by da Silva et al [33].…”

Section: Exercise Protocolmentioning

confidence: 99%

“…Several researchers have pointed out the positive cardiovascular system effects of isometric handgrip exercise at 30% or 50% of the maximum isometric contraction [33]. Specifically, it causes a modest hemodynamic effect [34], an increase in sympathetic modulation, and a decrease in parasympathetic modulation after exercise [33]. However, the combination of this type of exercise with simultaneous BFR does not appear to have been sufficiently studied.…”

Section: Introductionmentioning

confidence: 99%

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Hemodynamic Responses to a Handgrip Exercise Session, with and without Blood Flow Restriction, in Healthy Volunteers

et al. 2023

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Exercising at submaximal intensity with a hand dynamometer causes mild hemodynamic adaptations that can improve cardiovascular function. However, hemodynamic responses and fatigue have not been adequately studied in an isometric exercise protocol combined with blood flow restriction (BFR). Our study aimed to examine and compare acute hemodynamic responses and muscle fatigue after an isometric exercise session using a handgrip dynamometer, with and without BFR. Twelve volunteers performed the exercise protocol, with and without BFR, at random, with the BFR pressure set at 140 mmHg. Arterial blood pressure (BP), heart rate (HR), oxygen saturation (SpO2), and muscle fatigue were measured before, during, and 15 min after the completion of the exercise session. Without BFR, we noticed a slight, albeit statistically insignificant, HR increase. The variations found in systolic and diastolic pressure were small and statistically insignificant. Furthermore, blood oxygen saturation (SpO2) did not change significantly. Significantly higher levels of fatigue were found in exercise with BFR, compared to without BFR, at the end of each set of isometric contractions. In conclusion, a handgrip exercise session with mild BFR does not alter the acute hemodynamic responses to exercise in healthy volunteers. However, it results in higher muscle fatigue compared to that experienced after exercise without BFR.

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Water-based exercise effects on cardiac autonomic response: A systematic review

et al. 2023

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Respostas cardiovasculares após exercício isométrico com handgrip em diferentes intensidades

Cited by 4 publications

References 23 publications

Multi-Site Pulse Transit Times, Beat-to-Beat Blood Pressure, and Isovolumic Contraction Time at Rest and Under Stressors

Multi-Site Pulse Transit Times, Beat-to-Beat Blood Pressure, and Isovolumic Contraction Time at Rest and Under Stressors

Hemodynamic Responses to a Handgrip Exercise Session, with and without Blood Flow Restriction, in Healthy Volunteers

Water-based exercise effects on cardiac autonomic response: A systematic review

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