Patterson Jeremy A, Amick Ryan Z, Thummar Tarunkumar, Rogers Michael E
Department of Human Performance Studies, Wichita State University, Wichita, KS, USA.
Department of Industrial and Manufacturing Engineering, Wichita State University, Wichita, KS, USA.
Int J Sports Phys Ther. 2014 Apr;9(2):135-9.
PURPOSE/BACKGROUND: A number of different balance assessment techniques are currently available and widely used. These include both subjective and objective assessments. The ability to provide quantitative measures of balance and posture is the benefit of objective tools, however these instruments are not generally utilized outside of research laboratory settings due to cost, complexity of operation, size, duration of assessment, and general practicality. The purpose of this pilot study was to assess the value and validity of using software developed to access the iPod and iPhone accelerometers output and translate that to the measurement of human balance.
Thirty healthy college-aged individuals (13 male, 17 female; age = 26.1 ± 8.5 years) volunteered. Participants performed a static Athlete's Single Leg Test protocol for 10 sec, on a Biodex Balance System SD while concurrently utilizing a mobile device with balance software. Anterior/posterior stability was recorded using both devices, described as the displacement in degrees from level, and was termed the "balance score."
There were no significant differences between the two reported balance scores (p = 0.818. Mean balance score on the balance platform was 1.41 ± 0.90, as compared to 1.38 ± 0.72 using the mobile device.
There is a need for a valid, convenient, and cost-effective tool to objectively measure balance. Results of this study are promising, as balance score derived from the Smartphone accelerometers were consistent with balance scores obtained from a previously validated balance system. However, further investigation is necessary as this version of the mobile software only assessed balance in the anterior/posterior direction. Additionally, further testing is necessary on a healthy populations and as well as those with impairment of the motor control system.
Level 2b (Observational study of validity)(1.)
目的/背景：目前有多种不同的平衡评估技术可供使用且广泛应用。这些技术包括主观评估和客观评估。客观工具的优势在于能够提供平衡和姿势的定量测量，但由于成本、操作复杂性、尺寸、评估持续时间以及一般实用性等因素，这些仪器通常不在研究实验室环境之外使用。本初步研究的目的是评估利用开发的软件访问iPod和iPhone加速度计输出并将其转化为人体平衡测量的价值和有效性。
30名健康的大学生（13名男性，17名女性；年龄 = 26.1 ± 8.5岁）自愿参与。参与者在Biodex平衡系统SD上进行10秒的静态运动员单腿测试协议，同时使用带有平衡软件的移动设备。使用这两种设备记录前后稳定性，以与水平方向的角度位移表示，称为“平衡分数”。
两种报告的平衡分数之间无显著差异（p = 0.818）。平衡平台上的平均平衡分数为1.41 ± 0.90，而使用移动设备时为1.38 ± 0.72。
需要一种有效、方便且经济高效的工具来客观测量平衡。本研究结果很有前景，因为从智能手机加速度计得出的平衡分数与从先前验证的平衡系统获得的平衡分数一致。然而，由于此版本的移动软件仅评估前后方向的平衡，因此需要进一步研究。此外，还需要对健康人群以及运动控制系统受损人群进行进一步测试。
2b级（有效性观察性研究）(1.)
