Adams Jose A, Patel Shivam, Lopez Jose R, Sackner Marvin A
Chief, Division of Neonatology, Mount Sinai Medical Center, Miami Beach, Florida, USA.
Student, University of Miami, Coral Gables, Florida, USA.
J Sports Med (Hindawi Publ Corp). 2018 Oct 1;2018:4340925. doi: 10.1155/2018/4340925. eCollection 2018.
Heart rate variability (HRV) reflects neural balance between sympathetic and parasympathetic autonomic nervous systems (ANS). Reduced HRV occurs in several chronic diseases and physical inactivity. External addition of pulses to the circulation restores HRV. A new method to add pulses to the circulation can be accomplished with a passive simulated jogging device (JD). We hypothesized that application of JD might increase HRV in seated and supine postures in a heterogeneous group of volunteer subjects.
Twenty ambulatory persons (age range 31-88) were recruited. The physical activity intervention (JD) moved the feet in a repetitive and alternating manner; upward movement of the pedal is followed by a downward movement of the forefoot tapping against a semirigid bumper to simulate tapping of feet against the ground during jogging. Each subject underwent four, 30 min sessions in seated and supine postures with the active JD and same with Sham. HRV was assessed at baseline (BL), and Recovery (REC) from analysis of an electrocardiogram. Time domain variables were computed, namely, standard deviation of all normal RR intervals (SDNN) and square root of the mean of the sum of the squares of differences between adjacent RR intervals (RMSSD). Frequency domain measures were determined using a standard Fast Fourier spectral analysis, as well as parameters of Poincaré plots.
Thirty minutes of JD significantly increased time domain measures and Poincaré parameters of HRV in both seated and supine postures. Frequency domain parameters showed no change. The effects of JD on HRV measures were not affected by age, gender, or posture.
The passive simulated jogging device increased HRV in both seated and supine postures. This intervention that provided effortless physical activity is a novel method to harness the beneficial effects of increasing HRV.
心率变异性（HRV）反映了交感神经和副交感神经自主神经系统（ANS）之间的神经平衡。HRV降低见于多种慢性疾病和身体活动不足的情况。向循环系统外部添加脉冲可恢复HRV。一种向循环系统添加脉冲的新方法可通过被动模拟慢跑装置（JD）来实现。我们假设，在一组异质性志愿者受试者中，应用JD可能会增加坐姿和仰卧姿势下的HRV。
招募了20名非卧床人员（年龄范围31 - 88岁）。身体活动干预（JD）以重复交替的方式移动双脚；踏板向上移动后，前脚掌向下移动并轻敲半刚性缓冲器，以模拟慢跑时脚与地面的轻敲动作。每位受试者在坐姿和仰卧姿势下各进行4次，每次30分钟的主动JD干预和假干预。通过分析心电图在基线（BL）和恢复（REC）时评估HRV。计算时域变量，即所有正常RR间期的标准差（SDNN）以及相邻RR间期差值平方和的平均值的平方根（RMSSD）。使用标准快速傅里叶频谱分析确定频域测量值以及庞加莱图的参数。
30分钟的JD干预在坐姿和仰卧姿势下均显著增加了HRV的时域测量值和庞加莱参数。频域参数无变化。JD对HRV测量值的影响不受年龄、性别或姿势的影响。
被动模拟慢跑装置在坐姿和仰卧姿势下均增加了HRV。这种提供轻松身体活动的干预是一种利用增加HRV有益效果的新方法。
