Relación Entre la Variabilidad de la Frecuencia Cardiaca y el Metabolismo en Reposo en Mujeres Mayores de la Ciudad de Tunja, Boyacá.

Abstract

Introduction: Aging is a natural process characterized by the gradual loss of physiological functions, influenced by development and lifestyle throughout life. The population over 60 years of age will double by 2050, highlighting the importance of understanding the physiological changes associated with age. This study focuses on heart rate variability (HRV) as an indicator of cardiovascular autonomic regulation and its relationship with resting metabolic rate (RMR) in older women. Objective: To analyze the relationship between heart rate variability and resting metabolic rate in older women. Methodology: The population was composed of women over 60 years of age from the older adult group of the Institute of Recreation and Sports of Tunja (IRDET). A sample of 42 women was selected by convenience sampling and body composition was evaluated by electrical bioimpedance using the TANITA BC-601F, resting metabolic rate (RMR) was measured with the Cosmed K5 metabolic cart, heart rate variability (HRV) was recorded at rest and supine position, using a Polar H10 sensor connected to the HRV Elite application. Results: a significant negative correlation was observed between rMSSD and TMR, with a correlation coefficient of r = -0.412 and a p value = 0.007. LF showed a significant positive correlation with TMR (r = 0.318, p = 0.040). HF reflecting parasympathetic activity, presented a significant negative correlation with TMR (r = -0.318, p = 0.040). Conclusions: It was evidenced that higher TMR is associated with greater sympathetic activation, challenging conventional understanding and suggesting the need for further investigations.