| Summary: | 碩士 === 國立體育學院 === 運動科學研究所 === 86 === Injuries in face, lower extremity, upper extremity are common in karate sport, consequently, the incidence of hand injury rises especially in practice. The purpose of this study was to determine the pressure distribution on fingers and cutaneous tactile sensitivity of hands. Besides, potential protective material was also evaluated. Subjects were classified as two groups including EXPgroup (12 elite male karate competitors; age 19.3±3.47 yr., Wt. 66.78±10.19 kg, Ht. 169.4±6.4 cm) and CON group (12 male popular college students; age 24.33 yr., Wt 67.72±7.37 kg, Ht. 172.9±7.0 cm). Data measured by HRMAT showed that higher mean peak pressure was localized in the index finger 2144±226.1 kPa, and middle finger (2612±610.8 kPa) in EXP group. In CON group, the pressure was distributed in all fingers except the thumb. Based on this finding, it was hypothesized that potential injuries may occur in fingers of karate competitors. By using monofilament wire test, we evaluated the cutaneous tactile sensitivity and found that monfilament index score in two of nine test regions was significantly (p<.05) higher in EXP group (posterior proximal left ring finger: 0.38±0.15 g; posterior proximal right middle finger: 3.5±5 g) than in CON group (posterior proximal left ring finger: 0.25±0.17 g; posterior proximal right middle finger: 0.30±0.14 g). In addition, grip test showed that force score (left hand :40.27±8.07 Kg, right hand: 39.85±6.28Kg) was significantly (p<.05) lower in EXPgroup than in CON group (left hand: 49.32±6.26 Kg , right hand:46.78±7.14 Kg). However,no significant difference was seen between groups in pinch test. Collectively, these results revealed that lowered was seen between groups in pinch test. Collectively, these results revealed that lowered cutaneous tactile sensitivity might occur in fingers of darate competitors due to specific sport profile such as consecutive beating. Therefore, to avoid unexpected sensory impair protective knuckle pads are strongly suggested to be utilized during routine practice. Protective effect was also compared among several kinds of materials and the data indicated that rubber functioned more efficiently in decreasing the peak pressure on fingers and protective effect was obviously proportional to the pad thickness.
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