Avaliação do limiar anaeróbio pela variabilidade da frequência cardíaca em diabéticos tipo 2

Lima, Yago Alves; Ferreira, Jamile de Jesus Pinto; Silva, Érika Ramos; Matos, Carlos José Oliveira de

doi:10.17267/2238-2704rpf.v10i1.2739

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…During an incremental stress test, a progressive reduction of the parasympathetic activity on the heart is observed, a phenomenon easily visualized through the SD1 index of the Poincaré plot (Tulppo et al., 1996). The stabilization point of this index represents the point of parasympathetic depression during exercise and is known as heart rate variability threshold (HRV T ) (Lima & Kiss, 1999). For HRV T assessment, the iR‐R were analyzed at each stage into 60‐second segments throughout the stress test.…”

Section: Methodsmentioning

confidence: 99%

Caffeine increases parasympathetic reactivation without altering resting and exercise cardiac parasympathetic modulation: A balanced placebo design

Rolim

Matos

Soares

et al. 2018

European Journal of Sport Science

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The sympathicotonic effect of caffeine is strongly evidenced in the literature. However, the effects of caffeine or caffeine expectancy on the cardiac parasympathetic modulation remain obscure. Thus, the aim of this study was to investigate the effects of caffeine consumption and expectancy of caffeine consumption on the cardiac parasympathetic modulation under different stress conditions. Twenty-one physically active men (22.3 ± 2.9 years, 25.2 ± 2.7 kg/m 2 ) consumed ∼3 mg/kg of caffeine received as caffeine, caffeine as placebo, placebo as placebo and placebo as caffeine. Parasympathetic modulation was assessed by heart rate variability (HRV-Poincaré SD1 index) at supine and orthostatic positions, during a submaximal exercise (HRV threshold-HRV T ) and during each 60 seconds (s) within 300 s of post-exercise active recovery. A factorial ANOVA for repeated measures (p < 0.05) was used to assess the effect of caffeine, expectancy and resting time after caffeine intake on the HRV. No significant effect of caffeine or expectancy was observed on the SD1 value at supine or standing positions (p = 0.47-0.53; p = 0.57-0.31, respectively), despite an increase in this variable after resting periods in both positions (p < 0.001). During exercise, caffeine and expectancy do not alter the HRV T (p = 0.51-0.39). However, higher SD1 values were observed after caffeine administration from 60 to 300 s post-exercise recovery (p = 0.01-0.05) but not for the effects of expectancy (p = 0.19-0.94). We concluded that low doses of caffeine or expectancy do not alter the resting cardiac parasympathetic modulation or HRV T . However, caffeine, but not expectancy, increases parasympathetic reactivation after a submaximal exercise test in young men.

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Section: Methodsmentioning

confidence: 99%

Caffeine increases parasympathetic reactivation without altering resting and exercise cardiac parasympathetic modulation: A balanced placebo design

Rolim

Matos

Soares

et al. 2018

European Journal of Sport Science

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“…A positive correlation was found between both peak VO 2 and ATHR levels, which are indicators of exercise capacity, 29,30 and 12,13‐diHOME levels. The relationship between ATHR has not been investigated previously, and as for peak VO 2 , there is only one study in the literature, and as in our study, a positive correlation between peak VO 2 levels and 12,13‐diHOME levels in active and sedentary adults has been shown 7 .…”

Section: Discussionmentioning

confidence: 87%

Effect of acute exercise on 12,13‐dihydroxy‐9Z‐octadecenoic acid (12,13‐diHOME) levels in obese male adolescents

Gurup

Yakal

Tarçın

et al. 2023

Clinical Endocrinology

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Objective: 12,13-Dihydroxy-9Z-octadecenoic acid (12,13-diHOME) is a lipokine secreted from brown adipose tissue, and it has positive effects on dyslipidemia.Acute exercise has been shown to lead to an increase in its secretion. In this study, it was aimed to investigate the relationship of 12,13-diHOME with obesity, exercise and dyslipidaemia for the first time in the adolescent age group.Design: Prospective study.Patients: Twenty-eight male adolescents with obesity and the same number of agematched healthy normal-weight male controls.Measurements: Fasting serum glucose, insulin, lipid and 12,13-diHOME levels were measured. Cardiopulmonary exercise testing was performed in all subjects using a stress test treadmill. Peak oxygen consumption (peak VO2) and anaerobic threshold heart rate (ATHR) were measured.Results: Adolescents with obesity had lower 12,13-diHOME levels than normalweight adolescents both before and after acute exercise (p = .025 and p = .019, respectively), and after acute exercise, 12,13-diHOME levels significantly increased in both groups (p = .001 for both). 12,13-diHOME levels negatively correlated with triglyceride, total cholesterol, LDL-C, and positively correlated with HDL-C. Also, peak VO 2 and ATHR levels showed positive correlation with 12,13-diHOME levels.Conclusion: 12,13-diHOME levels were found to be lower in adolescents with obesity than normal-weight adolescents and increased with acute exercise. Also, the close relationship of this molecule with dyslipidaemia in addition to that with obesity suggests that it has an important role in the pathophysiology of these disorders.Further molecular studies will further elucidate the role of 12,13-diHOME in obesity and dyslipidaemia.

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Avaliação do limiar anaeróbio pela variabilidade da frequência cardíaca em diabéticos tipo 2

Cited by 2 publications

References 3 publications

Caffeine increases parasympathetic reactivation without altering resting and exercise cardiac parasympathetic modulation: A balanced placebo design

Caffeine increases parasympathetic reactivation without altering resting and exercise cardiac parasympathetic modulation: A balanced placebo design

Effect of acute exercise on 12,13‐dihydroxy‐9Z‐octadecenoic acid (12,13‐diHOME) levels in obese male adolescents

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