신발의 착화시 인지적 편안함과 관련된 요인 분석 = Analysis of Cognitive Factors Related to Comfort on Footwear

다국어 초록 (Multilingual Abstract)

Korean shoes industry has been playing a substantial role in Korean economy, however the issue of lack of international competitiveness was raised and discussed in spite of its great potential. The primary reason for this is thought to be the lack of know-how on comfort footwear. Therefore, the purpose of this study was to find out the factors on comfort so that the Korean shoes industry can enhance and develop the new developing technology using the results of this study. Subjects in this study were 30 male university students with normal foot and no injury in lower extremity. Total of 22 shoe conditions were tested on shoe comfort and top 10 factors were analyzed using cinematography and ground reaction force measurement. Results of this study were as followings. 1. The best shoes in comfort cognition test had forefoot region 50 degree, rear-foot region 50 degree in mid-sole hardness, high arch in insole, standard last, and 2mm hill counter thickness. 2. Comfort was best when forefoot region thickness was in standard last level and hill-counter thickness was 2mm. 3. High and standard arch created comfort. Therefore, this factor should be considered when designing shoes or insole. 4. In two speed condition, pronation moment in hip joint and knee joint was decreased and they had little effect in comfort ratings. 5. Total change of rear-foot angle and total change of Achilles tendon angle was 7-11 degree, 10-13 degree in top 10 shoe conditions by the two speed condition, respectively and they had little effect in comfort ratings. 6. Forefoot region hardness should not be under 50 degree. Otherwise, pronation moment in hip, knee, ankle joint were increased. 7. Bottom up phenomenon might not happen with over 40 degree in mid-sole hardness for subjects under 70kg of body weight. Specially, for subjects over 50kg, it is thought that bottom up phenomenon will not happen, so this finding will be useful for designing shoes. Specially, medio-lateral control was ranked the fourth in spite that LAST round of hill-counter region was big with shoes-size of 280mm (standard 270mm). This finding suggests future study that medio-lateral control has little to do with rear-foot round but might have something to do with motion patterns and mid-sole hardness. Additionally, it is founded that pronation moment in knee and ankle joint was small when mid-sole hardness was small. This finding is contrary to the findings of former studies which found that pronation movement would increase as mid-sole hardness in rear-foot region would decreased, therefore future study for examining this should be followed.

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