Mechanical Power Flow Changes During Multijoint Movement Acquisition
| Autor: | Koji Kadota, Ken Hashizume, Tomoyuki Matsuo, Kazushi Tezuka |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Adult
Male medicine.medical_specialty Adolescent Movement Physical Therapy Sports Therapy and Rehabilitation Kinematics Dreyfus model of skill acquisition Physical medicine and rehabilitation Forearm Elbow Joint Task Performance and Analysis medicine Humans Orthopedics and Sports Medicine Joint (geology) Mechanical energy Motor skill Mathematics Circumduction Shoulder Joint General Medicine Hand Biomechanical Phenomena medicine.anatomical_structure Motor Skills Nephrology Arm Physical therapy Motor learning |
| Zdroj: | Research Quarterly for Exercise and Sport. 77:285-295 |
| ISSN: | 2168-3824 0270-1367 |
| DOI: | 10.1080/02701367.2006.10599362 |
| Popis: | We investigated the differences in mechanical power flow in early and late practice stages during a cyclic movement consisting of upper arm circumduction to clarify the change in mechanical energy use with skill acquisition. Seven participants practiced the task every other day until their joint angular movements conformed to those of an expert. During the practice sessions, participants' motions were digitally recorded once a week using four high-speed infrared cameras, and the joint kinematics and joint powers of the right arm were calculated. With practice, the inflow power derived from the net joint force increased at the hand, forearm, and upper arm segments by 143.1 +/- 17.2%, 57.1 +/- 7.3%, and 198.1 +/- 35.4%, respectively. In contrast, the power caused by the muscle joint moments was not significantly increased. These results suggested that participants acquired a motor pattern promoting transfer of the joint reaction forces. Results may provide some support for Bernstein's (1967) ideas that skill acquisition involves improving movement efficiency by greater use of nonmuscular forces. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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