3 research outputs found
Biomechanical Analysis of the Axial Pre-rotational Movement of the Pelvis for the Jireugi in the Taekwondo Juchumseogi Stance
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Όλ¬Έ (λ°μ¬)-- μμΈλνκ΅ λνμ : 체μ‘κ΅μ‘κ³Ό, 2013. 2. μ μΈμ.λ³Έ μ°κ΅¬μ λͺ©μ μ νκΆλ μ£ΌμΆ€μ μ§λ₯΄κΈ° μ κ³¨λ° μ’
μΆ μ νμ λμμ νΉμ±κ³Ό ν¨κ» μ’
μΆμ μ€μ¬μΌλ‘ ν ν리 νμ λμμ ν λ°μ λ° μ μ΄ κ³Όμ μ μ°κ΅¬νλλ° μλ€. μ΄λ¬ν λͺ©μ μ λ¬μ±νκΈ° μνμ¬ νκΆλ νμ μ λ¬Έ μ μ 11λͺ
μ λμμΌλ‘ λμ μλλ₯Ό λ³λ ν΅μ νμ§ μκ³ μ΅λν λΉ λ₯΄κ³ κ°νκ² ν곡μ λͺΈν΅μ λͺ©νλ‘ ν μ€λ₯Έμ μ£ΌμΆ€μ μ§λ₯΄κΈ°λ₯Ό 5ν μ€μνμλ€. 3μ°¨μ λμλΆμ μμ€ν
κ³Ό μ§λ©΄λ°λ ₯κΈ°λ₯Ό ν΅νμ¬ λΆμμ νμν κ°μ’
μλ£λ€μ νλνμκ³ , μ€νλμμλ₯Ό 15κ° λΆμ λ‘ λͺ¨λΈλ§ λ° μ§μμ’νκ³λ₯Ό μ€μ νμ¬ λΆμμ νμν κ°μ’
λ³μΈλ€μ μ°μΆνμλ€. κ³¨λ° μ’
μΆ μ νμ λμμ νΉμ±μ μμ보기 μνμ¬ κ΅¬κ° μκ°, κ³¨λ° λ° μ체μ μ’
μΆ μ€μ¬ νμ κ°λ, 골λ°-μ체μ μλκ°λ, κ³¨λ° λ° μ체μ κ°μλ, μ£Όλ¨Ή μ΅λ μλ ₯μ μΈ‘μ νμκ³ , ν¨κ³Όλ₯Ό λνλ΄κΈ° μνμ¬ μλμνμ μΈ λ°©λ²μ ν΅νμ¬ ν리μ μ€λ₯Έμͺ½ μ΄κΉ¨μ νμλ₯Ό μ°μΆνμλ€. νμ±μλμ§ μΆμ λ° SSC μ리μ μ μ© μ 무λ₯Ό νμΈνκ³ μ ν리μ κ°λ-κ°μλ λλ©΄μ μμ±νκ³ , ν리 μ£Όλ³ κ·Όμ‘κ΅°μ νμμ μΌμ λΆμνμλ€. λν ν리 νμ λ°μμ μλλ ₯κ³Ό μ μ΄ κ³Όμ μ μκΈ° μνμ¬ μ§λ©΄λ°λ ₯κ³Ό μ 리 ν ν¬, ν리μ μ€λ₯Έμͺ½ μ΄κΉ¨μ κ΄μ ν©λ ₯ λ° κ΄μ ν©νμ λ ₯, κ°μ΄λλ κΈ°μ¬λ, μΌλ λ±μ μ°μΆνμλ€. λΆμ κ²°κ³Όμ λ°λΌ κ³¨λ° μ’
μΆ μ νμ λμμ μννλ μ§λ¨μ μ νμ μ§λ¨μΌλ‘, νμ§ μμ μ§λ¨μ λΉμ νμ μ§λ¨μΌλ‘ λλμμΌλ©°, λ μ§λ¨ κ°μ νκ· λΉκ΅λ₯Ό μνμ¬ λ
립 t κ²μ μ μ€μνκ³ μ μμμ€μ .05λ‘ μ€μ νμλ€. μ΄μμ μ°κ΅¬ μ μ°¨λ₯Ό ν΅νμ¬ μ»μ μ°κ΅¬κ²°κ³Όλ λ€μκ³Ό κ°λ€.
κ³¨λ° μ’
μΆ μ νμ λμμ μ£Όλ¨Ήμ μ§λ₯΄κΈ° μν΄ λμμ μ€λΉνλ ꡬκ°μμ 골λ°μ μμ²΄λ³΄λ€ λ¨Όμ λΉ λ₯Έ μλλ‘ λͺ©νλ°©ν₯μΌλ‘ νμ μν€λ λμμΌλ‘μ, λΉμ νμ μ§λ¨μ λμ μ€λΉ ꡬκ°μμ 골λ°κ³Ό μ체λ₯Ό κ±°μ λμμ νμ μν€λ©° μ§λ₯΄κΈ° λμμ μμνλ λ°λ©΄μ, μ νμ μ§λ¨μ 골λ°μ λͺ©ν λ°©ν₯μΌλ‘ λΉμ νμ μ§λ¨μ λΉν΄ λ¨Όμ 4λ°° κ°λ 빨리 νμ μν¨ ν μ체μ νμ μ΄ λ€λ°λΌκ°λ νΉμ±μ λνλλ€. λν μ νμ μ§λ¨μ λΉμ νμ μ§λ¨μ λΉνμ¬ κ³¨λ°μ νμ λμ μκ°μ΄ 짧μκ³ , ν리μ μ€λ₯Έμͺ½ μ΄κΉ¨ λΆμ κ·Όμ‘κ΅°μ νμκ° κ°κ° μ½ 2λ°°μ 1.5λ°° ν° κ²μΌλ‘ λνλ, 짧μ λμ μκ° λμ ν° νμλ₯Ό λ΄λ μλ ¨λ κΈ°μ μ νΉμ±μ λνλλ€. ν° νμκ° λνλλ μ΄μ λ‘μ, ν리 κ·Όμ‘κ΅° νμμ μΌ λΆμμ ν΅νμ¬ μ νμ μ§λ¨μ λμ μ΄λ° stretch-shortening cycle(SSC) κΈ°μ μ μ¬μ©νκ³ μμμ νμΈνμμΌλ, λΉμ νμ μ§λ¨μ ꡬμ¬μ± μμΆλ§μ νκ³ μμλ€. μ§λ¨ κ° μ§λ©΄λ°λ ₯κ³Ό μ 리 ν ν¬μ λΉκ΅ λΆμμ ν΅νμ¬, μ νμ μ§λ¨μ μ΄ νλ€λ‘λΆν° μ»μ νμ λ ₯μ ν΅ν΄ κ³¨λ° λ° μ체λ₯Ό νμ μν€κ³ μ΄ν μμ©-λ°μμ©μ μν κ΄μ±μΌλ‘ μ£Όλ¨Ήμ μ§λ₯΄λ λ°λ©΄μ, λΉμ νμ μ§λ¨μ μ§λ₯΄κΈ° μν΄ μ£Όλ¨Ήμ λμ§λ μκ°κ³Ό κ·Έ μ΄νμλ κ³μνμ¬ μν μ§λ©΄λ°λ ₯ λ° μ 리 ν ν¬λ₯Ό μμ©μν€λ κ²μΌλ‘ λνλ¬λ€. λν νμ§λ‘λΆν°μ μν μ§λ©΄λ°λ ₯μ ν리 κ΄μ μ μ’
μΆ λ°©ν₯ ν° νμ λ ₯ λ° νμλ₯Ό μμ±νμκ³ , μ΄λ λ€μ μ΄κΉ¨ κ΄μ μ μ νμΆ, μ’μ°μΆ νμ λ ₯μΌλ‘ μ μ΄λμ΄ νμλ₯Ό μ¦λμν€λ μν μ νμλ€.
λ³Έ μ°κ΅¬μ κ³¨λ° μ’
μΆ μ νμ λμμ νλνλμ λ±κΈ°μ μ΄ μλ νκΆλ μ 체 κΈ°μ μ μ μ©λ μ μλ κΈ°λ₯μΌλ‘μ, νμ μ¦λ ν¨κ³Όκ° μλ SSC μ리λ₯Ό μ΄μ©νκ³ μκΈ° λλ¬Έμ, λ€λ₯Έ μλμκ³Ό μ°¨κΈ°μ λμΌνκ² μ μ©νλ€λ©΄ κ°λλ²μλ 짧μΌλ©΄μλ λΉ λ₯΄λ©° κ°ν νμ λμμ λ§λ€μ΄ λΌ μ μλ€. λν ν리μ μ’
μΆ νμ μ μμ λΆμ λ€μ μ§ν μμμ κΈ°μ¬κ° νΌμ νμΈνμμΌλ―λ‘, μν νμ λ ₯μ κ΄κ³λλ μ¬λ¬ λ³μΈλ€μ μΈμ§νκ³ κ·Ήλν ν μ μλ λ°©λ²μ κ³ μνμ¬ μλ ¨μλ€μκ² κ΅μ‘μν¨λ€λ©΄, λ³΄λ€ ν° κ΅μ‘ ν¨κ³Όμ κΈ°λ₯ λ° κ²½κΈ°λ ₯ ν₯μμ λμμ΄ λ κ²μ΄λΌ κΈ°λνλ€.The purpose of this study was to investigate the characteristics of the pelvic axial pre-rotational movement for the Jireugi in the Taekwondo Juchumseogi stance, by focusing on the torque generated and its transfer procedure by the rotation of the waist. Eleven elite Taekwondo Poomsae athletes participated. Each participant performed 5 right hand Jireugi in Juchumseogi stance as fast and strong as possible while their motion was recorded by a 3D motion analysis system and the ground reaction forces by two force plates. A 15-segment model with 15-local coordinate systems were used. The phase time, axial rotational angle of the pelvis and trunk, relative pelvis-trunk rotational angle, angular velocity, and maximal speed of the fist were measured according to each of the pelvis axial pre-movement conditions. To evaluate the efficiency, the power of the waist and right shoulder were also calculated using the inverse dynamics method. The angle-angular velocity diagram of the waist joint were created, and the power and work of the muscular group surrounding the waist were analyzed to verify the elastic energy accumulation and the effect of the stretch-shortening cycle(SSC) theory. From the ground reaction forces, the free moments, the resultant joint forces and torques of the waist and right shoulder joint, the angular momentum contribution and the work of whole body were computed and analyzed to understand the torque generation and its transfer procedure from the waists rotational movement. Through analysis of the pelvic rotational data, the participants were classified into a pre-rotational and none pre-rotational group. Significant differences were then investigated by a series of independent samples t-tests(Ξ±=.05).
The pelvic axial pre-rotational movement had a pelvis rotation earlier and faster than the trunk during the preparation phase of the Jireugi. For the none pre-rotation group, the pelvis and trunk rotated almost simultaneously, but pre-rotation group rotated the pelvis about 4 times faster than the other group and this led to the trunks rotation. The pre-rotation groups pelvic rotation time was shorter, the power of the waist and the right shoulder were about 2 times and 1.5 times greater respectively, than the none pre-rotation group. Thus, this seems to be a way to characterize skill level. The cause of the greater power seems to be the application of the SSC by the muscles surrounding the waist during the preparation phase of the pre-rotation group. For the none pre-rotation group, they only used the concentric contraction of the muscles surrounding the waist. All groups used the ground reaction force and the free moment to rotate the pelvis and trunk, but significant differences were showed at the fist thrusting phase and after. The inertia led the right upper limb throwing as the principle of action and reaction in the pre-rotation group. While the horizontal ground reaction force and the free moment affected the motion continuously in the none pre-rotation group. Additionally, the horizontal ground reaction force from the lower limb generated the waist axial torque and power transferring them to the shoulder anterior-posterior and medial-lateral axis.
The pelvic axial pre-rotational movement of this study may be applied to the all techniques of Taekwondo such as the hand skills and kicks. Because it uses the SSC theory, it has the effect of shortening of the range of movement, creating a fast and more powerful rotation, thus increasing the magnitude of impact. In addition, the coupled force of the distal segments is identified to have a significant contribution to the waist axial rotation. Therefore if the coaches educate their players to use their waist and the SSC more efficiently during techniques, then they will be able to produce quicker more powerful techniques.
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2) 골λ°κ³Ό μ체μ νμ κ°λ 50
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Όλ¬Έ(μμ¬)--μμΈλνκ΅ λνμ :체μ‘κ΅μ‘κ³Ό,2004.Maste