한국운동역학회지 (Korean Journal of Applied Biomechanics)

  • 제34권2호
  • /
  • Pages.81-92
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  • 2024
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  • 1226-2226(pISSN)
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  • 2093-9752(eISSN)
한국운동역학회 (Korean Society of Applied Biomechanics)
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달리기 속도의 변화가 인체 충격 가속도와 생체역학적 변인에 미치는 영향

Effects of Running Speed on Body Impact Acceleration and Biomechanical Variables

  • Young-Seong Lee (Department of Sports and Technology, Seo Kyeong University) ;
  • Jae-Won Kang (Motion Innovation Centre, Korea National Sport University) ;
  • Sang-Kyoon Park (Motion Innovation Centre, Korea National Sport University)
  • 투고 : 2024.05.30
  • 심사 : 2024.06.18
  • 발행 : 2024.06.30
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초록

Objective: The purpose of this study was to analyze the impact acceleration, shock attenuation and biomechanical variables at various running speed. Method: 20 subjects (height: 176.15 ± 0.63 cm, weight: 70.95 ± 9.77 kg, age: 27.00 ± 4.65 yrs.) participated in this study. The subjects ran at four different speeds (2.5 m/s, 3.0 m/s, 3.5 m/s, 4.0 m/s). Three-dimensional accelerometers were attached to the distal tibia, sternum and head. Gait parameters, biomechanical variables (lower extremity joint angle, moment, power and ground reaction force) and acceleration variables (impact acceleration, shock attenuation) were calculated during the stance phase of the running. Repeated measures ANOVA was used with an alpha level of .05. Results: In gait parameters, decreased stance time, increasing stride length and stride frequency with increasing running speed. And at swing time 2.5 m/s and 4.0 m/s was decreased compared to 3.0 m/s and 3.5 m/s. Biomechanical variables statistically increased with increasing running speed except knee joint ROM, maximum ankle dorsiflexion moment, and maximum hip flexion moment. In acceleration variables as the running speed increased (2.5 m/s to 4.0 m/s), the impact acceleration on the distal tibia increased by more than twice, while the sternum and head increased by approximately 1.1 and 1.2 times, respectively. And shock attenuation (tibia to head) increased as the running speed increased. Conclusion: When running speed increases, the magnitude and increasing rate of sternum and head acceleration are lower compared to the proximal tibia, while shock attenuation increases. This suggests that limiting trunk movement and increasing lower limb movement effectively reduce impact from increased shock. However, to fully understand the body's mechanism for reducing shock, further studies are needed with accelerometers attached to more segments to examine their relationship with kinematic variables.

키워드

과제정보

This study was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (Grant number: 2020S1A5A2A01046477).

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