Analysis of physical and mental loads during dressing aim to improve dressing difficulty

本研究旨在揭示适应性服装的影响，并利用心率变异性（HRV）的功率谱分析来研究更衣过程中身体和精神负荷的评估，以提高更衣难度。评估的有效性首先在健康人身上进行了检验，然后在脑瘫患者身上进行了检验。研究对象为5名健康女性（21-23岁）和1名脑瘫男性（18岁）。五个女人穿上两件不同类型的长袖t恤（一件容易穿，另一件难穿）。这位需要照顾的脑瘫患者穿上了三件不同类型的长袖t恤（一件是现成的t恤，还有两件是根据现成的t恤重新设计的，这样穿起来更方便）。采用HRV功率谱分析，评价各组t恤穿前及穿后3分钟的自主神经活动。我们的发现是，在穿上难穿的t恤1分钟后，健康受试者和脑瘫受试者的LF/HF比显著增加，而HF/TP（高频/总功率）比显著降低。因此，HRV功率谱分析是评价脑瘫患者穿戴便利性的有效方法。在感官评价中，当一件布在不容易的情况下，一件布容易敷料时，被评价为容易敷料。然而，人们认为心理负荷很大，因为LF/HF比值表明此时存在很大的生理紧张。因此，HRV的功率谱分析作为评价包扎难度的客观方法是有效的。

The present study was designed to suggest the effects of adapted clothes and to investigate assessments of physical and mental loads during dressing, using power spectral analysis of heart rate variability (HRV) aim to improve dressing difficulty. The effectiveness of the evaluation was first examined using healthy persons, then with a cerebral palsy patient. The subjects were five healthy women (21-23 yrs.) and a man with cerebral palsy (18 yrs.). The five women put on two long sleeve T-shirts of different types (one was easy to put on, the other difficult). The cerebral palsy patient, who required care, put on three long sleeve T-shirts of different types (a ready-made T-shirt, and two T-shirts that had been redesigned from ready-made T-shirts to make dressing easier). Autonomic nervous activity was evaluated before and 3 minutes after putting on each type of T-shirt, using power spectral analysis of HRV. Our finding was that one minute after putting on the T-shirt that was difficult to put on, the LF/HF ratio significantly increased, whereas the HF/TP (high frequency/total power) ratio remarkably decreased, with both the healthy subjects and the subject with cerebral palsy. Thus, it was suggested that power spectral analysis of HRV is an effective method to evaluate ease of dressing for cerebral palsy patients.And the sensory evaluation was assessed that a cloth was easy dressing when it put on easily one after not easily one. However, it was thought that a mental load was large because the LF/HF ratio showed that there was a large, physiological tension high at this time. Therefore, the power spectral analysis of HRV was effective as the objective method that evaluated the dressing difficulty.