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首页> 外文会议>Mediterranean Conference on Medical and Biological Engineering and Computing >Validity of Smartphone Accelerometers for Assessing Energy Expenditure during Fast Running
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Validity of Smartphone Accelerometers for Assessing Energy Expenditure during Fast Running

机译：智能手机加速度计评估能源支出的智能手机加速度计的有效性

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Recent advances in smartphone technology have facilitated the generation of mobile applications to monitor exercise performance. The aim of the present study was to investigate the validity and reliability of the triaxial accelerometers in the HTC and Samsung platforms for assessing energy expenditure (EE) during walking and fast running. Eleven endurance-trained participants (nine males and two females, mean ± s.d.: Age 35 ± 10 years; Maximal aerobic capacity 58.5 ± 7.2 ml·min~(-1)·kg~(-1)) completed two identical discontinuous incremental exercise tests on a treadmill. The tests consisted of walking (4, 5, and 6 km·h~(-1)) and running (8,10,12, 14, 16, 18, and 20 km·h~(-1), or until volitional exhaustion) for 3 min at each speed, followed by 3 min of recovery for all speeds faster than 10 km·hr~(-1). Acceleration was recorded in all three axes of motion using a novel application on each device and expressed as vector magnitude (VM). Respiratory variables used to assess EE were measured using indirect calorimetry. The reliability of EE and acceleration measured between tests 1 and 2 were assessed using intraclass correlation coefficients (ICC). The validity of the accelerometers to assess EE was determined using Pearson's correlation coefficient. Measurements of EE and VM recorded using both devices were highly reproducible between tests 1 and 2 (ICC: EE = 0.976; HTC VM = 0.984; Samsung VM = 0.971). All accel-erometer outputs rose linearly with speed during walking and running up to and including 20 km·h~(-1). EE was significantly correlated with both HTC VM (R = 0.98, P < 0.001) and Samsung VM (R = 0.99, P < 0.001). Data from the present study suggests that the inbuilt triaxial accelerometers in HTC and Samsung smartphone devices offer a valid and reliable method for determining the change in EE during fast running.
机译：在智能手机技术的最新进展提供了便利的移动应用程序来监视运动性能的产生。本研究的目的是调查在HTC的三轴加速度计和三星平台的有效性和可靠性，在行走过程中评估能量消耗（EE）和快速运行。十一耐力训练的参与者（9名男性和女性2，平均值±SD：年龄35±10岁;最大有氧能力58.5±7.2毫升数×分钟〜（-1）·公斤〜（-1））完成了两个相同的不连续的增量运动测试在跑步机上。该试验包括步行的（4，5，6公里·H〜（-1））和运行（8,10,12，14，16，18，和20公里之·H〜（-1），或直到意志用尽），用于在每个速度3分钟，接着为所有速度恢复为3分钟到10公里更快·小时〜（-1）。加速度被记录在使用每个设备上的新的应用运动的所有三个轴，并表示为向量幅度（VM）。用于评估EE呼吸变量使用间接量热法测量。 EE和加速度的试验1和2之间测量的可靠性是使用内相关系数（ICC）评估。的有效性加速计来评估EE使用Pearson相关系数确定的。 EE和VM的测量使用两个设备分别测试1和2之间高度可重现的记录（ICC：EE = 0.976; HTC VM = 0.984;三星VM = 0.971）。所有加速 - erometer输出与速度行走和跑步至多且包括20公里期间线性地上升·H〜（-1）。 EE与两个HTC VM（R = 0.98，P <0.001）和三星VM（R = 0.99，P <0.001）是显著相关。从目前的研究数据表明，内置的三轴加速度计在HTC和三星的智能手机设备提供用于在快速行驶判断在EE变化的有效和可靠的方法。

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