2006 Fiscal Year Final Research Report Summary
Evaluation of physical training by developing the measurement system on muscle-force and muscle-fiber behavior during human movements
| Project/Area Number |
16300205
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Sports science
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| Research Institution | The University of Tokyo |
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Principal Investigator |
FUKASHIRO Senshi The University of Tokyo, Graduate School of Interdisciprinary Information Studies, The University of Tokyo, Associate Professor, 大学院・情報学環, 助教授 (50181235)
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| Co-Investigator(Kenkyū-buntansha) |
KANEHISA Hiroaki The University of Tokyo, Graduate School of Arts and Sciences, Professor, 大学院・総合文化研究科, 教授 (50161188)
ITO Masamitsu Nippon Sport Science University, Faculty of Physical Education, Assistant Professor, 体育学部, 講師 (20307995)
HARADA Nanako Saga University, Faculty of Culture and Education, Professor, 文化教育学部, 教授 (70181021)
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| Project Period (FY) |
2004 – 2006
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| Keywords | Human movement / estimation of muscle force / 3D Motion analysis / Computer simulation / Minimum joint torque |
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| Research Abstract |
In numerous studies between 2004 and 2006, we have investigated the biomechanics of various fundamental movements and methods to improve QOL for elderly people.
First, we compared different methodologies (1: PCSA, 2: EMG, 3: Optimization methods) for estimating the force distributions of the agonist muscles during leg extension movements. We found that optimization was strongly related to the PCSA and that the forces of muscles crossing two joints were smaller than those of single joint muscles.
We have also simulated vertical jumping by using Hill type muscle-tendon complex (MTC) modeling. We searched for the optimal neural input during simulation for maximum jumping height. In an experimental setting, we analyzed Ankle Jumping, Squat Jumping without counter movement, Counter Movement Jumping from a standing position, and Drop Jumping from a 20 cm height by ultrasonography and motion-capture system. The results quantitatively demonstrated that the tendinous structures of the gastrocnemi
… More
us medialis had a significant role in the force generating capacity of the MTC, by allowing the contractile elements (muscle tissues) to work at the optimal range of the Force-Length and Force-Velocity relations in all jumps.
In another study, the minimum joint torque required of the lower limb for elderly people to stand up from a chair was estimated by computer simulation. A range of actual standing motions (85 trials) from a 40 cm chair were collected by motion-capture system and used as the inputs for a computer simulation of over 50000 different standing movements. It was concluded that the summed minimum torque of the hip and knee joints required to successfully stand up was 116 Nm (1.57Nm/kg).
Finally, the biomechanics of standing patterns performed by an expert in the use of Japanese body technique were analyzed by motion capture system. The standing motion using the body technique had reduced knee joint torque compared to normal motion, and this motion was shown to be similar to the minimal knee joint torque standing motion generated by computer simulation. Less
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