지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
이용수
초록· 키워드
오류제보하기
Objective: The purpose of this study was to evaluate the biomechanical effects of insole material and hardness in different plantar regions on the comfort and impact absorption during walking and to analyze the correlations between comfort and impact variables.
Background: It is necessary to apply materials tailored to the functionalities of different plantar regions during different phases of the gait cycle: the rearfoot portion should absorb the impact force during the heel-contact phase, the midfoot portion should support the entire arch, and the forefoot portion should enhance the swing efficiency during the toe-off phase.
Method: Twenty men in their twenties were recruited for the study (age: 23.4±2.7yrs; height: 175.9±4.1㎝; weight: 72.9±9.4㎏). They wore insoles in random order. Pedar-X system (Novel GmbH, USA) and Treadmill (Instrumented treadmill, Bertec, USA) were used to measure the plantar pressure and ground reaction force. The walking speed was set at 1.3㎧ and 1.7㎧. The sampling rate was set at 50㎐ and 1,000㎐, respectively. For comfort testing, the subjects administered a questionnaire survey using the visual analogue scale (VAS) after walking 1km. Three insole models were tested: Insole A using a mixed material with shock-absorbing and anti-rebound components uniformly spread throughout the insole; Insole B and Insole C using sponge and ethylene vinyl acetate (EVA), respectively, as underlying material and strengthened with shock absorber in the rearfoot portion, high-hardness material in the midfoot portion, and anti-rebound function in the forefoot portion. The impulse, mean impact force, initial peak of ground reaction force, and loading rate were
calculated.
Results: First, Insole B significantly outscored Insole A in terms of the forefoot cushioning comfort (p ＜.05), with Insole B and C showing higher overall comfort scores compared with Insole A (p ＜.05). Second, Insole A showed higher mean impact force, initial and peak vertical ground reaction forces, and loading rate compared with Insoles B and C, but without reaching statistical significance. Third, Insole B and C showed statistically higher mean pressure in the midfoot portion compared with Insole A (p ＜.05).
Conclusion: Positive effects in terms of comfort and impact absorption were demonstrated by the insoles fabricated with different materials and hardness tailored to the functionalities of different plantar regions in comparison with the conventional insoles using the uniform material throughout the insole. In particular, positive effects on overall comfort were found to be ascribable to the enhanced hardness in the midfoot portion, which supported the arch more efficiently and contributed to an even distribution of the overall pressure on the plantar.
Application: The study results can be applied to insole development as follows: Insole material and hardness should be varied for different plantar regions, and shock absorber and high-hardness material should be used for the rearfoot and midfoot portions, respectively.
Background: It is necessary to apply materials tailored to the functionalities of different plantar regions during different phases of the gait cycle: the rearfoot portion should absorb the impact force during the heel-contact phase, the midfoot portion should support the entire arch, and the forefoot portion should enhance the swing efficiency during the toe-off phase.
Method: Twenty men in their twenties were recruited for the study (age: 23.4±2.7yrs; height: 175.9±4.1㎝; weight: 72.9±9.4㎏). They wore insoles in random order. Pedar-X system (Novel GmbH, USA) and Treadmill (Instrumented treadmill, Bertec, USA) were used to measure the plantar pressure and ground reaction force. The walking speed was set at 1.3㎧ and 1.7㎧. The sampling rate was set at 50㎐ and 1,000㎐, respectively. For comfort testing, the subjects administered a questionnaire survey using the visual analogue scale (VAS) after walking 1km. Three insole models were tested: Insole A using a mixed material with shock-absorbing and anti-rebound components uniformly spread throughout the insole; Insole B and Insole C using sponge and ethylene vinyl acetate (EVA), respectively, as underlying material and strengthened with shock absorber in the rearfoot portion, high-hardness material in the midfoot portion, and anti-rebound function in the forefoot portion. The impulse, mean impact force, initial peak of ground reaction force, and loading rate were
calculated.
Results: First, Insole B significantly outscored Insole A in terms of the forefoot cushioning comfort (p ＜.05), with Insole B and C showing higher overall comfort scores compared with Insole A (p ＜.05). Second, Insole A showed higher mean impact force, initial and peak vertical ground reaction forces, and loading rate compared with Insoles B and C, but without reaching statistical significance. Third, Insole B and C showed statistically higher mean pressure in the midfoot portion compared with Insole A (p ＜.05).
Conclusion: Positive effects in terms of comfort and impact absorption were demonstrated by the insoles fabricated with different materials and hardness tailored to the functionalities of different plantar regions in comparison with the conventional insoles using the uniform material throughout the insole. In particular, positive effects on overall comfort were found to be ascribable to the enhanced hardness in the midfoot portion, which supported the arch more efficiently and contributed to an even distribution of the overall pressure on the plantar.
Application: The study results can be applied to insole development as follows: Insole material and hardness should be varied for different plantar regions, and shock absorber and high-hardness material should be used for the rearfoot and midfoot portions, respectively.
목차
1. Introduction
2. Method
3. Results
4. Discussion
5. Conclusion
References
참고문헌 (42)
참고문헌 신청
[학술지(정기간행물)] - Alex, M. / 1993 / Ethylene-Vinyl Acetate (EVA) Copolymers: A General Review / IEEE Electrical Insulation Magazine 9 (1)
[학술지(정기간행물)] - Cavanagh, P.R. / 1980 / Ground reaction forces in distance running / Journal of Biomechanics 13 : 397 ~ 406
[학술지(정기간행물)] - 정재후 / 2015 / 드롭 착지 시 탄소나노튜브 소재의 인솔 착용이 하지의 합성 관절 모멘트 및 근활성도에 미치는 영향 / 체육과학연구 26 (3) : 479 ~ 487
[학술지(정기간행물)] - 채원식 / 2012 / 탄소나노튜브 인솔 착용에 따른 드롭 착지 동작의 생체역학적 분석 / 한국운동역학회지 22 (4) : 429 ~ 435
[학술지(정기간행물)] - Chen, H. / 1994 / Relationship between plantar pressure distribution under the foot and insole comfort / Clinical Biomechanics 9 (6) : 335 ~ 341
[학술지(정기간행물)] - Cavanagh, P.R. / 1980 / Ground reaction forces in distance running / Journal of Biomechanics 13 : 397 ~ 406
[학술지(정기간행물)] - 정재후 / 2015 / 드롭 착지 시 탄소나노튜브 소재의 인솔 착용이 하지의 합성 관절 모멘트 및 근활성도에 미치는 영향 / 체육과학연구 26 (3) : 479 ~ 487
[학술지(정기간행물)] - 채원식 / 2012 / 탄소나노튜브 인솔 착용에 따른 드롭 착지 동작의 생체역학적 분석 / 한국운동역학회지 22 (4) : 429 ~ 435
[학술지(정기간행물)] - Chen, H. / 1994 / Relationship between plantar pressure distribution under the foot and insole comfort / Clinical Biomechanics 9 (6) : 335 ~ 341
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