Comparison of the Polar S810i monitor and the ECG for the analysis of heart rate variability in the time and frequency domains

Oliveira

et al. 2015

Rev Bras Med Esporte

RESUMOIntrodução: O tabagismo é uma das principais causas de morbimortalidade em todo o mundo. Indivíduos fumantes têm risco aumentado de desenvolver disfunção autonômica, a qual pode ser avaliada tanto pela variabilidade da frequência cardíaca (VFC) como pela frequência cardíaca de recuperação (FCRec). A maioria dos estudos envolvendo esta análise é realizada em adultos de idade avançada e na condição de repouso. Objetivos: Comparar a atividade autonômica cardíaca em repouso e esforço, em homens jovens, fumantes e não fumantes. Métodos: Trinta e dois jovens voluntários, (idade 22,0 ± 2,8 anos) foram distribuídos em dois grupos: o grupo fumante (GF; n=15) e o não fumante (GNF; n=17). Realizou-se o teste de Cooper, com análise da VFC pelo cardiofrequencímetro Polar ® s810i, em repouso e durante o esforço e FCRec. Resultados: No GF, 73% foram classificados com nível de dependência nicotínica "muito baixa" segundo questionário de Fargeström. A classificação de ativos e muito ativos pelo questionário IPAQ correspondeu a mais de 50% da amostra em ambos os grupos. Não se observou diferenças significativas entre os grupos na VFC, tanto no repouso quanto no esforço. Entretanto, em cada grupo, notou-se diferença na maioria dos índices de VFC do repouso para o esforço. No teste de Cooper não foram observadas diferenças significativas na FCmédia, FCpico e de FCRec entre os grupos, mas notou-se uma melhor capacidade funcional no GNF pela distância caminhada (2050,2 ± 300,0 vs. 1780,3 ± 390,4 m, p=0,036). Conclusão: O GF apresentou menor capacidade funcional e ativação parassimpática durante o esforço, além de menores índices de VFC durante repouso, o que pode sugerir um comprometimento precoce na modulação autonômica cardíaca.Palavras-chave: exercício, hábito de fumar, disautonomias primárias. , were divided into two groups: the smoking group (SG, n = 17 (2050.2 ± 300.0 vs. 1780.3 ± 390.4m, p = 0.036 ABSTRACT Introduction: Smoking is one of the major causes of morbidity and mortality worldwide. Smokers have an increased risk of developing autonomic dysfunction, which can be evaluated by both heart rate variability (HRV) and heart rate recovery (HRRec). Most studies involving this analysis is performed on adults of advanced age and in condition of rest. Objectives: To compare the cardiac autonomic activity, at rest and during exercise in young men

Section: Discussionunclassified

“…A análise da VFC foi realizada por cardiofrequencimetro (Polar ® s810i; Finlândia) 17 . Os dados foram registrados em duas fases: o repouso pré--exercício (1ª fase) com duração de 10 minutos, sendo analisados os cinco minutos finais; e durante esforço no TC (2ª fase) a qual teve duração de 12 minutos.…”

Section: Métodounclassified

Comparação Da Modulação Autonômica Cardíaca Durante Esforço De Fumantes E Não Fumantes

Oliveira

et al. 2015

Rev Bras Med Esporte

“…This equipment has been previously validated to capture HR beat to beat as well as the use of the data for analysis of HRV indices (13).…”

Section: Autonomic Evaluationmentioning

confidence: 99%

“…Digital complemented by manual filtering was carried out to eliminate premature ectopic beats and artifacts, and only series with more than 95% of sinus beats were included in the study (13).…”

Section: Autonomic Evaluationmentioning

confidence: 99%

Evaluation of frequency of positive exercise-induced bronchospasm between swimmers and sedentary individuals

et al. 2017

Introduction: Despite the prevalence of prescribed asthma, there is uncertainty about the incidence of exercise-induced bronchospasm (EIB). Objective: Compare the frequency of EIB between swimmers and sedentary individuals, and observe heart rate variability during bronchial activity. Methods: In total, 18 swimmers (group 1) and 18 sedentary individuals (group 2) were included. The participants rested for 30 minutes for evaluation of HRV. Blood pressure (PA), respiratory rate (RR), and pulse oxygen saturation (SpO2) were measured. The volunteers remained seated for the spirometry test (maneuver of forced vital capacity -FVC). This was repeated 5, 10, 15, 20, and 30 minutes after the exercise test. The statistical analysis used the Student t, Mann Whitney, and Shapiro-Wilks tests. The significance level was p <0.05. Results: The spirometry findings showed 3 sedentary individuals and 10 swimmers with obstructive ventilatory disorder (OVD). Only 2 of the sedentary and none of the swimmer group demonstrated positive bronchial provocation. A key criterion for diagnosing OVD, the relationship between forced expiratory volume in one second and FVC (FEV1/FVC), was

“…After receiving an explanation of the data collection procedures, an electrode was placed on the volunteer's chest next to the xiphoid process using an elastic strap, and a heart rate receiver (Polar Electro, model S810i, Finland) was attached to the participant's wrist. The equipment had been previously validated to record beat-to-beat heart rate and for use in collecting heart rate variability (HRV) data for analysis 18 .…”

Section: Autonomic Modulationmentioning

confidence: 99%

Effects of a multidisciplinary program on autonomic modulation in overweight or obese children and adolescents

Ricci‐Vitor

Rossi

Hirai³

et al. 2016

J. Hum. Growth Dev.

Effects of a multidisciplinary program on autonomic modulation in overweight or obese children and adolescents J Hum Growth Dev. 2016; 26(2): 154-161 DOI: http://dx.doi.org/10.7322/jhgd.119257 AbstractPurpose: this study evaluated the effects of a multidisciplinary program on autonomic modulation in overweight or obese children and adolescents.Methods: fi fteen individuals with 10,93 ± 2,28 years were submitted to autonomic evaluation using heart rate variability before and after a program based on physical exercises for three months, three times a week, 60 minutes per session and psychological and nutritional counseling. Data was analyzed using the paired t-test or Wilcoxon test and the level of signifi cance was set at P < 0.05.Results: multidisciplinary program was able to promote benefi ts in autonomic modulation observed thought temporal (SDNN: 39,96 ± 10,33 x 49,44 ± 12,31; p = 0,019; rMSSD: 28,97 ± 11,50 x 37,26 ± 11,17; p = 0,018), spectral (LFnu: 64,49 ± 12,21 x 56,74 ± 11,18; p = 0,014; HFnu: 35,50 ± 12,21 x 43,25 ± 11,18; p = 0,014) and geometrical (SD1: 20,51 ± 8,13 x 26,36 ± 7,90; p = 0,018 SD2: 52,31 ± 13,04 x 64,58 ± 16,33; p = 0,031) indices in overweigh and obese children and adolescents. Also, after the intervention there was a reduction on resting heart rate (88,53 ± 9,24 x 83,09 ± 7,93; p = 0,023) and there were changes in the classifi cation of overweigh 26,67% x 46,66% and obesity 73,33% x 53,33%, although not signifi cant changes in body mass index.Conclusions: exercise program together with nutritional and psychological counseling is able to promote benefi ts in autonomic modulation in children and adolescents who are overweight or obese.