do Sacramento Marvyn de Santana, Leite Josias Melo, Ribeiro Maria Williane de Sousa, Barbosa Ramon Martins, de Jesus Tailma Costa, Souza Pedro Elias Santos, de Oliveira Alice Miranda, Petto Jefferson
Actus Cordios Cardiovascular Rehabilitation, Salvador, BA, Brazil.
Bahiana School of Medicine and Public Health, Salvador, BA, Brazil.
Ann Transl Med. 2024 Oct 20;12(5):86. doi: 10.21037/atm-24-59. Epub 2024 Oct 15.
The isometric exercise performed using the handgrip (HG) acutely promotes elevation of systolic blood pressure (SBP) and diastolic blood pressure (DBP), and in a non-consensual manner among articles elevation or maintenance of heart rate (HR). Currently, although there is a vast literature on the hemodynamic effects of interval training and isometric exercise with HG alone, there is still no consistent evidence of such adjustments occurring in the association between the two. Therefore, the objective of this study was to describe the acute hemodynamic responses found only during interval training and when combined with isometric contraction with HG.
This is a pilot study of a crossover clinical trial. Seven male volunteers, aged 24±3.9 years, underwent three protocols on an ergometric treadmill, with a 3-minute warm-up at 30% of heart rate reserve (HRR), four sprints 2 minutes at 50% HRR and active intervals at the same speed as the warm-up. Randomization was carried out in a simple random manner. The protocols were classified according to the use of HG during sprints, as follows: PI = without HG; PII = HG 30% of handgrip strength (HGS) and PIII = 60% of HGS). Variations (Δ) in HR, double product (DP), SBP and DBP were evaluated.
The presence of HG did not change HR behavior, but it increased DP (PI: 10,472±2,539 PII: 12,217±1,933 PIII: 13,369±3,089) through SBP, which in PI had a plateau behavior of 15±22.2 mmHg, while PII varied with an average of 41±12.2 mmHg and PIII 47±11.1 mmHg, in the 4 sprint. DBP fell in PI with 12±13.2 mmHg, while PII and PIII showed an drop of 0±19.6 and 6±13.0 mmHg in the last sprint, respectively.
The use of HG during interval training directly modulates hemodynamic variables, promoting an increase in SBP elevation, attenuation of the drop in DBP and an increase in DP, without an increase in HR.
RBR-78fhyrf. Available in https://ensaiosclinicos.gov.br/rg/RBR-78fhyrf.
使用握力器（HG）进行的等长运动可急性促进收缩压（SBP）和舒张压（DBP）升高，且在各文章中关于心率（HR）升高或维持的情况存在分歧。目前，尽管有大量关于间歇训练和单独使用HG进行等长运动的血流动力学效应的文献，但关于两者联合时是否会发生此类调整仍没有一致的证据。因此，本研究的目的是描述仅在间歇训练期间以及与HG等长收缩联合时发现的急性血流动力学反应。
这是一项交叉临床试验的初步研究。7名年龄在24±3.9岁的男性志愿者在功率计跑步机上进行了三种方案，先以心率储备（HRR）的30%进行3分钟热身，然后以HRR的50%进行4次2分钟冲刺，并以与热身相同的速度进行主动间歇。采用简单随机方式进行随机分组。根据冲刺期间HG的使用情况对方案进行分类，如下：PI = 不使用HG；PII = HG为握力强度（HGS）的30%；PIII = HG为HGS的60%）。评估HR、双乘积（DP）、SBP和DBP的变化（Δ）。
HG的存在并未改变HR行为，但通过SBP增加了DP（PI：10,472±2,539；PII：12,217±1,933；PIII：13,369±3,089），在PI中SBP有15±22.2 mmHg的平台期表现，而在4次冲刺中，PII平均变化为41±12.2 mmHg，PIII为47±11.1 mmHg。DBP在PI中下降了12±13.2 mmHg，而在最后一次冲刺中，PII和PIII分别下降了0±19.6 mmHg和6±13.0 mmHg。
在间歇训练期间使用HG可直接调节血流动力学变量，促进SBP升高、DBP下降幅度减小以及DP增加，而不会使HR增加。
RBR - 78fhyrf。可在https://ensaiosclinicos.gov.br/rg/RBR - 78fhyrf获取。
