Database_Validation Rmssd Selftraining UMH

Two different devices that recorded HRV were used for the measurements: a Biopac MP35 3-lead electrocardiogram (Biopac Systems, Goleta, CA, USA) and the new smartphone application (Selftraining UMH (Elche, Spain)). The electrocardiogram was connected to a computer via USB port and the mobile application was linked using Bluetooth to a previously validated HR sensor chest strap (Polar H10, Polar Electro Oy, Kempele, Finland). Four consecutive 6-minute recordings were captured by alternating the supine position with the seated position in a resting state. During the 6-minute period, the first minute was perfomed to stabilize the HRV signal and the last 5 minutes in each position were taken for the subsequent analysis.本研究采用两款不同设备开展心率变异性（Heart Rate Variability, HRV）测量：分别为Biopac MP35型三导联心电图仪（Biopac Systems，美国加利福尼亚州戈利塔市）与新型智能手机应用程序Selftraining UMH（西班牙埃尔切市）。该心电图仪通过USB端口连接至计算机，而该移动应用则通过蓝牙与一款经预先验证的心率传感胸带（Polar H10，芬兰凯姆佩勒市Polar Electro Oy）建立连接。本次实验以静息状态下交替更换仰卧位与坐位的方式，采集了四次连续的6分钟记录。在每轮6分钟的记录周期内，首1分钟用于稳定HRV信号，仅保留每个体位下的最后5分钟数据用于后续分析。