Resumen: En la actualidad se plantea que una alteración en el funcionamiento del sistema nervioso autónomo (SNA) podría está implicada en la cronifi cación de la sintomatología que presenta la fi bromialgia (FM). El objetivo de este estudio es comparar el funcionamiento del SNA mediante la evaluación de la variabilidad de la frecuencia cardiaca (VFC) entre mujeres con fi bromialgia y sanas, y analizar su relación con distintas dimensiones del estado de salud percibido. Los resultados confi rman que las mujeres con FM presentan una actividad parasimpática, hormonal y termorreguladora más disminuida que las mujeres sanas en situación de reposo; y la relación del desequilibrio del SNA (mediante el análisis de la VFC) con los síntomas más frecuentes en la FM, mientras que su relación con el estado de salud percibido queda pendiente de desarrollo.Palabras clave: Fibromialgia; sistema nervioso autónomo; variabilidad de la frecuencia cardiaca; síntomas; estado de salud percibido. Autonomic nervous system functioning and health in fi bromyalgiaAbstract: Presently it is proposed that an alteration of autonomic nervous system (ANS) functioning may be involved in the chronicity of fi bromyalgia (FM) symptoms. The aim of this study is to compare ANS activity by assessing the heart rate variability (HRV) between women with FM and healthy ones, and analyze its relationship with different dimensions of perceived health. The results confi rm that women with FM have a more diminished parasympathetic, hormonal and thermoregulatory activity than healthy women at rest; and the existing relationship of ANS imbalance (analyzed with HRV) with the most common FM symptoms, while its relationship with perceived health needs more development.
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