Why the study?
Obesity is associated with autonomic nervous system dysfunction linked to cardiovascular diseases, and isometric exercise may favor the reduction of cardiovascular risk and autonomic imbalance.
Does an acute session of isometric exercise improve autonomic parameters and blood pressure compared to aerobic exercise in obese and overweight sedentary adults?
RCT (n=20)
Randomly distributed
No
Does an acute session of isometric exercise improve autonomic parameters and blood pressure compared to aerobic exercise in obese and overweight sedentary adults?
Answers are grounded in this paper and cite their sources.
An acute session of isometric exercise generates a greater decrease in heart rate variability, heart rate, and systolic blood pressure compared to aerobic exercise in obese and overweight individuals.
Introduction: Obesity is understood as a chronic inflammation associated with complications in the autonomic nervous system dysfunction related to cardiovascular diseases. And isometric exercise, represented by manual grip strength, favors the reduction of cardiovascular risk and autonomic imbalance. Objective: to describe the acute response of an isometric exercise (IE) compared to the effect of an aerobic exercise (AE), analyzing the autonomic parameters of heart rate variability (LF/HF), diastolic blood pressure (DBP), systolic blood pressure (SBP) and heart rate (HR) in obese and overweight people. Methodology: 20 participants were randomly distributed into 2 groups; those who performed an aerobic exercise session on a cycle ergometer for 15 min at 50 watts (n=10) and those who performed an IE session at 30% of maximal strength (n=10). Both were evaluated pre and post intervention, the variables were analyzed using the Mann-Whitney U statistical test with a significance level of p<0.05. Results: IE produced statistically significant changes in SBP (p= 0.001), LH/HF (p=0.02) and HR (p=0.018), while DBP improved, but not significantly. Conclusions: an EI session generates a greater decrease than EA in HRV, HR and SBP variables. Introducción: La obesidad es entendida como una inflamación crónica asociada a complicaciones en la disfunción del sistema nervioso autónomo relacionada con enfermedades cardiovasculares. Y el ejercicio isométrico, representado por la fuerza de prensión manual, favorece la reducción del riesgo cardiovascular y al desequilibrio autonómico. Objetivo: describir la respuesta aguda de un ejercicio isométrico (EI) comparándolo con el efecto de un ejercicio aeróbico (EA), analizando los parámetros autonómicos de variabilidad de la frecuencia cardiaca (LF/HF), presión arterial diastólica (PAD), sistólica (PAS) y la frecuencia cardiaca (FC) en personas obesos y en sobrepeso. Metodología: 20 participantes fueron distribuidos al azar en 2 grupos; los que realizaron una sesión de ejercicio aeróbico en cicloergómetro durante 15 min a 50 watts (n=10) y los que realizaron una sesión de EI al 30% de la fuerza máxima. Ambos fueron evaluados pre y post intervención, se analizaron las variables mediante la prueba estadística U de Mann-Whitney con un nivel de significancia p<0,05. Resultados: El EI produjo cambios estadísticamente significativos en PAS (p= 0,001), LH/HF (p = 0,02) y FC (p=0,01), mientras que la PAD mejoró, pero no de forma significativa. Conclusiones: una sesión de EI, genera una mayor disminución que el EA en las variables de VFC, FC y PAS.
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Espinoza-Salinas et al. (2022) conducted an RCT in Obesity and overweight (n=20). Isometric exercise vs. Aerobic exercise (15 min at 50 watts on a cycle ergometer) was evaluated on Systolic blood pressure (SBP) (p=0.001).
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