La asociación entre la obesidad y un mayor riesgo de morbimortalidad cardiometabólica es un hecho, pero las alteraciones metabólicas provocan cambios autonómicos que no siempre son detectados en una institución de salud. Objetivo: Evidenciar el efecto de un protocolo interválico de alta intensidad sobre la actividad cardiovagal en personas con sobrepeso, evaluando por medio de la variabilidad de la frecuencia cardiaca. Método: Colaboraron 20 personas con sobrepeso, sin otros antecedentes mórbidos. Su edad fue de 24,6 ± 2,17 años; índice de masa corporal (IMC) de 27,11 ± 1,38 kg•m-2; presión arterial sistólica y diastólica de 126,4 ± 2,49 y de 86,1 ± 1,85 mmHg, respectivamente. El muestreo fue realizado por conveniencia. Se distribuyeron aleatoriamente en Grupo de intervención (GI, n=10) y Grupo de Control (GC, n=10). Resultados: Se registraron diferencias significativas entre los grupos, en los tiempos donde los valores de inicio son menores que a la sexta semana (F: 120,412; G.L.=1; 7; p= 0,003). Además, existe diferencia estadística entre el valor SD1 del GC > GE (F: 6,700; G.L.=1; 7; p= 0,036) y solamente en el GI, entre la 1 semana > 6 semana (EMMEANS =10,400; p=0,001). Conclusión: En seis semanas de intervención, con un protocolo de activación vagal, aumentó la modulación parasimpática en reposo en personas con sobrepeso.Summary. The association between obesity and an increased risk of cardiometabolic morbidity and mortality is a fact, but most of the time there are metabolic disorders that cause autonomic changes not always detected by health institutions. Objective: To demonstrate the effect of a high intensity and short duration interval protocol on cardiovagal activity in overweight people through the evaluation of heart rate variability. Method: a total of 20 overweight people without other morbid backgrounds collaborated in the study. Their age was 24.6 ± 2.17 years old; body mass index (BMI) of 27.11 ± 1.38 kg • m-2; systolic and diastolic blood pressure of 126.4 ± 2.49 and 86.1 ± 1.85 mmHg, respectively. Sampling was done by convenience. They were randomly distributed in Intervention Group (GI, n = 10) and Control Group (GC, n = 10). Results: Significant differences were registered between the groups, the starting values being lower than after sixth week (F: 120,412; G.L. = 1; 7; p = 0,003). In addition, there is a statistical difference between the SD1 value of the GC> GE (F: 6,700; GL = 1; 7; p = 0.036) and only in the GI, between 1 week> 6 weeks (EMMEANS = 10,400; p = 0.001). Conclusion: After the six-week intervention with a vagal activation protocol, parasympathetic modulation at rest increased in overweight people.
Background: Arterial hypertension is among the leading causes of mortality worldwide. The primary non-pharmacological management of arterial hypertension is isometric grip training, which has shown better results than pharmacological methods; however, it has not been thoroughly studied in large muscle groups. Objective: This study compared the pressor response of isometric exercise training at different intensities, in large versus small muscle groups, in sedentary eutrophic and overweight people aged 20-29 years. Methods: A sample of 93 people (57 people with excess weight and 36 people of normal weight) participated in isometric training for 5 days, subdivided into leg press versus Handgrip strength, with different intensities for each subgroup (30 and 50%, 1 RM). Before and after the 5 training days, heart rate variability (HRV) and systolic and diastolic blood pressure, BSBP-BDBP and PSBP-PDBP, were measured to evaluate the state of sympathetic activation at rest and pressor response. Results: Changes with significant differences (p <0.05) in terms of pre-post training measurements in the eutrophic group were the BSBP-PSBP variables at 30% and 50% 1 RM for manual isometric grip strength. In the excess weight group, the only significant change was the PSBP variable in Handgrip strength at 30% 1 RM. It should be noted that in all cases, blood pressure values tended to reduce. Conclusion: Isometric strength exercises in large and small muscle groups show a tendency to reduce blood pressure values; however, the isometric Handgrip force at 30% 1 RM shows statistically significant reductions in blood pressure values.
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