Sports Coaching College, Beijing Sport University, Beijing, China.
School of Sport Medicine and Physical Therapy, Beijing Sport University, Beijing, China.
Front Public Health. 2022 Sep 8;10:950074. doi: 10.3389/fpubh.2022.950074. eCollection 2022.
The purpose of this research was to determine if the scientific research device combined heart rate variability combined with an acceleration sensor (Firstbeat Bodyguard 2, BG2) was valid and reliable for time spent in different intensity zones in free-living. A total of 55 healthy participants performed 48-h physical activity (PA) monitoring with BG2, ActiGraph GT3X+ (GT3X+), and completed Bouchard Physical Activity Diary (Bouchard) every night. In the available studies, GT3X+ is considered the gold standard scientific research device for PA monitor. We compared BG2 and Bouchard with GT3X+ by difference, correlation, and agreement of PA and energy expenditure (EE) in free-living. The results showed that BG2 estimated PA more accurately than Bouchard, with a modest correlation ( > 0.49), strong agreement (τ > 0.29), and they had the lowest limits of agreement when estimating moderate to vigorous physical activity (MVPA). The EE estimated by Bouchard was the highest among the three methods, and the correlation and agreement between the three methods were high. Our findings showed that the BG2 is valid and reliable for estimating time spent in different intensity zones in free-living, especially in MVPA.
本研究旨在确定心率变异性与加速度传感器相结合的科研设备（Firstbeat Bodyguard 2，BG2）在自由生活中评估不同强度区间时间是否有效和可靠。共有 55 名健康参与者使用 BG2、ActiGraph GT3X+（GT3X+）进行了 48 小时的身体活动（PA）监测，并每晚填写布沙尔体力活动日记（Bouchard）。在现有研究中，GT3X+被认为是 PA 监测的科研金标准设备。我们通过 PA 和能量消耗（EE）在自由生活中的差值、相关性和一致性，将 BG2 和 Bouchard 与 GT3X+进行了比较。结果表明，BG2 比 Bouchard 更准确地估计 PA，相关性较强（>0.49），一致性较高（τ>0.29），且在估计中高强度体力活动（MVPA）时，两者的协议界限最低。Bouchard 估计的 EE 在三种方法中最高，三种方法之间的相关性和一致性较高。我们的研究结果表明，BG2 在评估自由生活中不同强度区间的时间方面是有效和可靠的，尤其是在 MVPA 方面。
