The impact of regular physical training on the function of the autonomic nervous system in patients with inappropriate sinus tachycardia

<ns3:p>Introduction: Sympathetic overactivity plays a crucial role in the pathogenesis of inappropriate sinus tachycardia (IST). It has been shown that regular physical activity positively affects the balance between the sympathetic and parasympathetic nervous systems, which may benefit patients with IST.Objective: This study aimed to assess the impact of regular physical training on the autonomic nervous system (ANS) function in patients with IST, focusing on heart rate variability (HRV) as an indicator of autonomic balance.Methods:The study included 32 female patients diagnosed with IST, with 16 in the study group (Group A) and 16 in the control group (Group B). The women in Group A participated in a structured physical training program lasting 12 weeks. HRV was analyzed based on 24-hour Holter monitoring recordings before and after the intervention. The statistical data obtained were presented as graphs illustrating changes in selected HRV parameters in response to physical training.Results:The study results indicate a significant improvement in heart rate variability (HRV) after 12 weeks of regular physical training in the study group. Notably, there was an increase in parameters associated with parasympathetic activity, such as the HF (High Frequency) index. Additionally, the SDNN index, which measures overall heart rate variability, also improved. These observations suggest that physical training contributed to an improvement in autonomic balance. The graphs in the study clearly depict changes in individual HRV parameters, confirming the positive impact of physical activity on the function of the autonomic nervous system in patients with IST.</ns3:p>