Efeito do treinamento com pesos na pressão arterial de repouso em idosas normotensas

Abstract

Introduction: Resistance training (RT) has been widely used for older adults in order to minimize or reverse the deleterious effects of aging in the neuromuscular system. However, the potential benefits of RT on arterial blood pressure and resting heart rate in older adults remain controversial. Objective: To analyze the effect of eight weeks of RT on systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP) and heart rate (HR) in older women without hypertension. Methods: Seventeen women (aged 66.0 ± 5.8 years) without previous experience in RT were randomly assigned to either a training (TG, n = 10) or control (CG, n = 7) groups. Hemodynamic parameters at rest were evaluated by auscultatory method (mercury sphygmomanometer) and HR monitor (Polar), before and after eight weeks of experimental period. Results: Reduction possibly caused by RT were found only to SBP (-13.4 mmHg, p <0.01). Although significant reductions were observed for DBP and MAP, the analysis of covariance showed no interaction Group x Time significant. Conclusion: RT proved to be an effective training to promote adaptations in the cardiovascular system of older women without hypertension. Eight weeks of RT can significantly reduce resting SBP in older women.

Four Weeks of Detraining Induced by COVID-19 Reverse Cardiac Improvements from Eight Weeks of Fitness-Dance Training in Older Adults with Mild Cognitive Impairment

“…In a recent comprehensive systematic review and meta-analysis of 191 studies assessing HR adaptation following regular physical exercise, Reimers et al [ 70 ] indicated that, in the general population, endurance-based training, as well as combined endurance and strength based-training, significantly decreased the resting HR (2.7 to 5.8 bpm). Specifically, in older adults (>60 years old), previous studies investigating eight-week endurance [ 71 , 72 , 73 , 74 , 75 ] or strength-based [ 76 , 77 , 78 ] training programs (frequency of 1.5 to 3 session/week), showed a beneficial effect for only endurance-based training programs, with a significant reduction of resting HR ranging from 4.5 to 8 beat/min. Regarding the effect of combined endurance and strength training programs on the resting HR of older adults, previous studies have reported a beneficial effect (reduction of 2.4 to 6.1 beat/min) from 12 to 25 weeks of training (frequency of 2 to 3 session/week) [ 79 , 80 , 81 ].…”

Effect of traditional resistance training on blood pressure in normotensive elderly persons: a systematic review of randomized controlled trials and meta-analyses

“…Of the 29 remaining studies, 23 were excluded because they presented inadequate or non-existent information on randomization or because they presented outcomes that did not meet the specific objectives of this study (Figure 1). Thus, six studies were included in this review [26][27][28][29][30][31] .…”

“…The sample size in each study ranged from 17 to 40 participants. In three studies the participants were of both genders 26,27,29 while the others used only female subjects 28,30,31 . The duration of the intervention ranged from eight to 24 weeks, with a frequency of three sessions per week.…”

“…Four studies presented a training time of up to 12 weeks 27,28,30,31 and two studies had a training time greater than 12 weeks 26,29 . Two studies were separated according to the intensity used (low and high intensity) 27,29 , although this strategy generated a doubling of the total number of Control Group participants (n=94) in these studies (Tables 1 and 2).…”

“…Four of the studies analyzed involved an intervention for 12 weeks 27,28,30,31 , with a longer intervention in only two studies 26,28 . The works of Tsutsumi et al 27 and Vicent et al 29 , which obtained contradictory results despite featuring high and low intensity groups of equal design, are worthy of note.…”