Biomechanical analysis of walking with two types of sports shoes and poutine in healthy young people

Walking is the only daily physical activity that is done in detail without even conscious attention. One of the important tasks of biomechanics experts is to investigate walking in different environmental conditions, the results of which can have additional help in the future health of people. One of the most important external factors investigated in walking is the types of shoes, because the long-term effects are also different with the variety in different parts of the shoes. Shoes are designed for different functions and environmental conditions, so it makes sense to correlate stiffness and elasticity with functional tasks (such as walking). In addition to shoe appearance, durable materials, foot protection, etc., shoe performance during use has become a very important feature in shoe design. Sports shoes are requested based on their design needs. For example, when walking, the heel hits the ground first and a force greater than the body weight is applied to the heel. In order to protect the foot and heel against a large impact force, the energy from this impact must be absorbed by the material of the heel of the shoe, this situation requires gravity (a force absorber similar to the shock absorber of a car bumper) and elasticity (fenrite) in the material of shoe heel. In the stage of contact of the foot or establishment of the foot with the ground, the foot goes to plantar flexion and then separates from the ground through the front of the foot. At this point, very little energy should be absorbed by the sole material of the shoe, so that the fenrite helps the athlete move forward and upward. Therefore, to ensure the required characteristics for safety, compliance, strength and at the same time achieving optimal performance, the evaluation of shoe stiffness along with its effect on kinematics and kinetics can be considered essential. The method used in this research was in such a way that light reflecting markers were first used to identify each organ. The markers attached to the subject's body were spherical with a diameter of ۱۴ mm, which were attached to specific anatomical points with double-sided adhesive tape based on the Rajakopal marker model. These points included the upper anterior and posterior superior spine, four markers on the outer thigh, four markers on the outer leg, outer ankle, first metatarsal, fifth metatarsal, heel, C۷, T۱۰, acromion, elbow, wrist, and sternoclavicular. . The marking method was selected from the book (Van Sin Jant). Subjects walked on the designated route at normal speed ۵ times with shoes and ۵ times with boots. The starting place of stepping was chosen by trial and error in such a way that each of the legs has a full stride within the calibrated space. The distance from the starting point of walking to the calibrated space was such that before entering the calibrated space, the subject had to take at least ۷ steps and also the length of the path of ۱۶ meters made it possible to take at least ۷ steps after the space. take away With these conditions, the effect related to the start of stepping and stopping was removed. Opensim software was used for data analysis. In this research, all kinetic variables including reaction force, torque and joint power were normalized to the weight of the subjects

کلیدواژه ها:

Kinematic and kinetic indicators ، sports shoes ، biomechanical analysis ، shoe performance