The purpose of this study was to evaluate the functionality, accuracy, and usability of a novel smart exercise application (SEA). The functionality such as counting lunges, providing task-related auditory feedback, and testing short-term memory was examined while thirteen young adults (6 men, age 25.4 ± 8.3 years) performed the lunge exercise with the SEA. The accuracy of logged motion data including angles and accelerations were also tested. Another twenty-five participants (11 men, age 23.2 ± 5.7 years) evaluated the usability of the SEA interest, motivation, convenience, and strength/cognitive benefit via a questionnaire. The SEA assessed the lunge motion correctly, provided auditory feedback, and tested users’ short-term memory as required. High correlations (r = 0.90 to 0.99) with low RMSE (4.85˚ for direction angle, 0.13 to 0.22 m/s2 for acceleration) were observed between the sensor output and the reference output. Bland-Altman plot also showed a low discrepancy between each of the two measures. Most participants positively answered all questions about interest (60%), motivation (40%), convenience (80%), strength benefits (92%), and cognitive benefits (88%) of the SEA. The SEA demonstrated accurate kinematic assessment of accelerations and directions, assessed the lunge motion correctly, and created the appropriate auditory feedback on the short-term memory task. The high rate of positive responses suggested the potential of the application in future use.

中文翻译：

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智能运动应用程序通过类似游戏的弓步运动来改善腿部功能和短期记忆

这项研究的目的是评估新型智能锻炼应用程序（SEA）的功能，准确性和可用性。在十三名年轻人（6名男性，年龄25.4±8.3岁）使用SEA进行弓箭锻炼时，检查了诸如计数弓箭，提供与任务相关的听觉反馈以及测试短期记忆等功能。还测试了记录的运动数据（包括角度和加速度）的准确性。另有25名参与者（11名男性，年龄23.2±5.7岁）通过问卷评估了SEA兴趣，动机，便利性和力量/认知益处的可用性。SEA正确评估了弓步运动，提供了听觉反馈，并根据需要测试了用户的短期记忆。高相关性（r = 0.90至0.99）和低RMSE（方向角为4.85˚，0.13至0）。在传感器输出和参考输出之间观察到22 m / s2的加速度）。布兰德-奥特曼（Bland-Altman）图也显示出两种方法之间的差异很小。大多数参与者对SEA的兴趣（60％），动机（40％），便利（80％），力量优势（92％）和认知优势（88％）的所有问题都给予了积极回答。SEA演示了加速度和方向的精确运动学评估，正确评估了弓步运动，并针对短期记忆任务创建了适当的听觉反馈。积极的回应率很高，表明该应用有潜在的未来用途。大多数参与者对SEA的兴趣（60％），动机（40％），便利性（80％），力量收益（92％）和认知收益（88％）的所有问题都给予了积极回答。SEA演示了对加速度和方向的精确运动学评估，正确评估了弓步运动，并针对短期记忆任务创建了适当的听觉反馈。积极的回应率很高，表明该应用有潜在的未来用途。大多数参与者对SEA的兴趣（60％），动机（40％），便利性（80％），力量收益（92％）和认知收益（88％）的所有问题都给予了积极回答。SEA演示了对加速度和方向的精确运动学评估，正确评估了弓步运动，并针对短期记忆任务创建了适当的听觉反馈。积极的回应率很高，表明该应用有潜在的未来用途。