Cardiovascular Effects of a Strength Test (1rm) in Prehypertensive Subjects

Abstract

Introduction: Physical exercise promotes positive physiological adaptations, reducing the risk of developing cardiovascular diseases and promoting greater autonomic control of heart rate and reduction in pressure levels. Objective: To compare the behavior of arterial pressure and autonomic heart rate modulation in the 1-repetition maximum knee extension test, performed on the 45-degree leg press machine in normotensive and prehypertensive subjects. Methods: Twenty-four male volunteers were assessed. Blood pressure (BP) and heart rate variability (HRV) were evaluated at rest, immediately after the maximum load achieved and during the 10, 20, 30 and 40-minute recovery phases. Statistical analyses were obtained using SigmaStat 3.5 software and a level of significance of 5%. Results: Mean and standard deviation were used to identify 12 normotensive patients (N) aged = 25.5 ± 5.7 years; height = 174.3 ± 6.6 cm; BMI = 24.9 ± 2.4; SBP on average = 112.6 ± 5.6 mmHg and 12 prehypertensive (PH) patients aged = 29.8 ± 6.5 years; height = 175.7 ± 6.7 cm; BMI = 27.8 ± 6.5; mean SBP = 131.1 ± 3.2 mmHg. There was a statistical difference in the pNN50 index (%) at rest (PH = 1.13 ± 0.66 and N = 1.58 ± 0.35) and in the LF/HF index, also at rest (PH = 0.18 ± 0.29 and N = −0.18 ± 0.36). Conclusion: The one-repetition maximum (1RM) test did not promote cardiovascular risk in the prehypertensive group during its execution, with double product results lower than 30,000 mmHg.bpm, demonstrating lower cardiac overload. Moreover, HRV exhibited similarity in sympathetic-vagal behavior, in the time/frequency domain, between the groups. Level of Evidence III; Study Case-control.

Factors that affect heart rate variability following acute resistance exercise: A systematic review and meta-analysis

“…After review, a total of 26 studies were included in the systematic review and meta-analysis. 14 , 15 , 16 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 52 , 53 , 54 , 55 , 56 , 57 All included articles were published between 2006 and 2019 ( Fig. 1 ).…”

“…Since then, several experimental studies have examined the effect of ARE on HRV. 14 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 However, there are some discrepancies in the findings since some studies show the opposite effect on HRV parameters following an ARE session. 14 , 32 , 39 , 40 Furthermore, it is unclear what the magnitude of the ARE has on HRV parameters.…”

"Effects of Two Different Types of Tele-Monitored Physical Training on Cardiac Autonomic Modulation in Healthy Young People"

“…al., [20] that recorded significant values in the variables LF ms², HF ms² in the groups that performed concentric exercise of the isolated agonist: concentric exercise of the knee extensors, in 3 sets of 10 repetitions, with a velocity of 60°/sec. Lima [23] analyzed that high values of the variable pNN50…”