摘要
Background: Geometric methods provide an analysis of autonomic modulation using the geometric properties of the resulting pattern, and represent an interesting tool in the analysis of heart rate variability (HRV). The aim of this study was to evaluate the impact of functional training on cardiac autonomic modulation in healthy young women using the geometric indices of HRV. Methods: Data were analyzed from 29 women, and were stratified into a functional training group (FTG, n = 13; 23.00 ± 2.51 years; 21.90± 2.82 kg/m2) and a control group (CG, n = 16; 20.56 ± 1.03 years; 22.12±3.86 kg/m2). The FTG received periodized functional training for 12 weeks. The cardiac autonomic modulation of both groups was evaluated before and after this training, and a qualitative analysis was performed using the Poincar6 plot. Results: There was a significant increase in the difference of the triangular index (RRTri), SDI, SD2, and RR intervals in the FTG as compared to the CG, and the qualitative analysis from the Poincar6 plot showed an increase in the dispersion of beat-to-beat and long-term RR intervals in the functional group after training. No changes were observed in the triangular interpolation of RR interval histogram (TINN) or SD1/SD2. Conclusion: Functional training had a beneficial impact on autonomic modulation, as characterized by increased parasympathetic activity and overall variability, thus highlighting the clinical usefulness of this type of training.
背景:几何法指用生成图样的几何特性分析自主调节,是一种分析心率变异性(HRV)的有效工具。本研究旨在研究HRV几何指数评价功能训练对健康年轻女性心脏自主调节的影响。方法:将29名女性通过分层抽样分为功能训练组(FTG,n=13;23.00±2.51岁;21.90±2.82 kg/m^2)和对照组(CG,n=16;20.56±1.03岁;22.12±3.86 kg/m^2)。训练组接受12周功能训练,评价2组训练前后的心脏自主调节,并用Poincare plot进行定性分析。结果:与对照组相比,训练组三角指数(RRTri)、SD1、SD2和RR间期的差异明显增加:Poincare plot定性分析显示,训练组在训练后每搏RR间隔和长期RR间隔的离差增大,RR间期直方图中的三角形插值、SD1和SD2均无变化。结论:功能训练能对心脏自主调节产生有益作用,表现为副交感神经活性和整体变异性提高,表明功能训练具有临床应用价值。