Recuperação Da Variabilidade Da Frequência Cardíaca Após O Tabagismo

Abstract

The cigarette contains harmful substances to the organism, capable of modifying the cardiac autonomic modulation and bringing important damages to the health. This study aimed at calculating the acute effects of smoking on the Heart Rate Variability (HRV) and the HRV of smokers. Thirty-one young smokers aged between 20 and 30 years of both genders were evaluated. Twelve participants were excluded due to overweight/obesity, hypertension, diabetes, respiratory diseases, cardiac and/or neurological diseases. The Fagerstrom Tolerance questionnaire was applied to estimate the degree of nicotine-dependency. We analyzed time domain and HRV frequency indices, recorded in the control group and during smoking. The control group consisted of smoking simulation. At rest, the HRV was reduced in the control group (LF (nu): Controls + 11 vs. 70.8 Experimental: -80.6 + 6; p = 0.03; CI (nu): Control-29.2 + 11 vs. 19.4 + Experimental-6; p = 0.03) and, during the smoking protocol, the HRV was reduced in the experimental group (LF (nu): Control-60.78 + 11 vs. 77.7 + Experimental-8; <0.01; CI (nu): Control-39.3 + 22 Experimental vs 22.3 + -8; p <0.01). Smoking can greatly reduce the HRV.

The Effect of High-Intensity Interval Training on Blood Lactate Levels and Rate of Perceived Exertion in Sedentary Healthy Adults

“…The study's inclusion criteria are set to the age range of 18 to 40 years, based on the previous research conducted by Cardoso et al (2012) in Brazil with ages between 18-40 years and based on the definition of young adults by Hurlock (2001). 15 With such criteria, 44 participants of 18-40 years old with a mean age of 30 years old were included. The average body mass index of subjects in this study was 23.5 (3.3) kg/m2, which was classified as overweight.…”