Short Time Effect of Auxetic Shoe on Kinematics and Kinetics of Vertebral Column During Drop Vertical Jump

Rahmani Dahaghani, Mostafa | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53433 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Nourani, Amir; Arjmand, Navid
  7. Abstract:
  8. Investigating the influence of shoes on variables of human biomechanics is of a high importance. The purpose of this study was to examine the effect of auxetic Nike Free RN shoe on kinematics and kinetics of human body. It was asked from 11 healthy male to perform drop vertical jump in three conditions: with auxetic Nike Free RN, with conventional shoe and barefoot. 3D Cartesian positions of the markers, which were stuck to the subjects’ bodies, were recoeded using Vicon camera system. Ground reaction force and its center of pressure of each foot captured using two force plates. Moreover, activation of rectus abdominis, longissimus, iliocostalis lomburom and multifidus were recorded using surface EMG. Modeling and simulation of the experiment was performed in OpenSim using FBLS model. After analyzing data it was inferred that maximum L5-S1 compression force (ρ<0.001), maximum L5-S1 external moment(ρ=0.002), aIEMG of Longissimus(ρ<0.001), aIEMG of iliocostalis lumborum(ρ<0.001) and minimum anterior-posterior distance between ground reaction force center of pressure and heel(ρ=0.002) were lower when the subjects wore auxetic shoes during the rebound phase of DVJ. Furthermore, it was concluded that vertical ground reaction force, L5-S1 shear force and L5-S1 passive moment were not affected by auxetic shoe
  9. Keywords:
  10. Spine ; Correlation Coefficient ; Electromyography ; Poisson Geometry ; Lumbosacral (L5-S1) Moment ; Auxetic Materials ; Vertical Jump ; Low Back Pain

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