Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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Effects for Running Shoes with Resilience of Midsole on Biomechanical Properties

미드솔의 반발탄성이 러닝화의 생체역학적 특성에 미치는 영향

  • Yoo, Chan-Il (Department of Healthcare Engineering, Graduate School of Chonbuk National University) ;
  • Won, Yonggwan (School of Electronics and Computer Engineering, Chonnam National University) ;
  • Kim, Jung-Ja (Division of Biomedical Engineering, College of Engineering, Chonbuk National University)
  • 유찬일 (전북대학교 대학원 헬스케어공학과) ;
  • 원용관 (전남대학교 공과대학 전자컴퓨터공학부) ;
  • 김정자 (전북대학교 공과대학 바이오메디컬공학부)
  • Received : 2015.01.31
  • Accepted : 2015.03.20
  • Published : 2015.03.31
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Abstract

Objective : The purpose of this study was to evaluate the effect for running shoes with resilience of midsole on biomechanical properties. Methods : 10 healthy males who had no history of injury in the lower extremity with an average age of 26.5 year(SD=1.84), height of 172.22 cm(SD=4.44) and weight of 67.51 kg(SD=6.17) participated in this study. All subjects ran on the treadmill wearing three different running shoes. Foot pressure data was collected using Pedar-X system(Novel Gmbh, Germany) operating at 100 Hz. Surface EMG signals for biceps femoris, rectus femoris, vastus lateralis, medial lateralis, tibialis anterior, medial gastrocnemius, soleus and peroneus longus were acquired at 1000 Hz using Bignoli 8 System(Delsys Inc., USA). To normalize the difference of the magnitude of muscle contractions, it was expressed as a percentage relative to the maximum voluntary contraction (MVC). The impact resilience of the midsole data was collected using Fastcam SA5 system(Photron Inc., USA). Collected data was analyzed using One-way ANOVA in order to investigate the effects of each running shoes. Results : TPU midsole was significantly wider in contact area than EVA, TPE midsole in midfoot and higher in EMG activity than EVA midsole at biceps femoris. TPE midsole was significantly wider in contact area than EVA midsole in rearfoot and higher in peak pressure than EVA midsole in forefoot. EVA midsole was significantly higher in EMG activity than TPU midsole at tibia anterior. In medial resilience of midsoles, TPE midsole was significantly higher than EVA, TPU midsole. Conclusion : TPU midsole can reduce the load on the midfoot effectively and activate tibialis anterior, biceps femoris to give help to running.

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References

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