Contrasting Age Effects on Complexity of Tracking Force and Force Fluctuations During Monorhythmic Contraction
| Autor: | Ing Shiou Hwang, Yen Ting Lin, I-Chen Lin, Wei-Min Huang, Chien Chun Huang, Yi Ching Chen |
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| Rok vydání: | 2020 |
| Předmět: |
Male
Aging Entropy Physical Therapy Sports Therapy and Rehabilitation Isometric exercise 050105 experimental psychology Young Adult 03 medical and health sciences 0302 clinical medicine Control theory Isometric Contraction Humans 0501 psychology and cognitive sciences Muscle Skeletal Compensatory tracking Aged Mathematics Pursuit tracking Stochastic Processes 05 social sciences Rehabilitation Motor control Female Geriatrics and Gerontology Gerontology 030217 neurology & neurosurgery Muscle Contraction |
| Zdroj: | Journal of Aging and Physical Activity. 28:114-121 |
| ISSN: | 1543-267X 1063-8652 |
| DOI: | 10.1123/japa.2019-0034 |
| Popis: | This study contrasted the stochastic force component between young and older adults, who performed pursuit tracking/compensatory tracking by exerting in-phase/antiphase forces to match a sinusoidal target. Tracking force was decomposed into the force component containing the target frequency and the nontarget force fluctuations (stochastic component). Older adults with inferior task performance had higher complexity (entropy across time; p = .005) in total force. For older adults, task errors were negatively correlated with force fluctuation complexity (pursuit tracking: r = −.527 to −.551; compensatory tracking: r = −.626 to −.750). Notwithstanding an age-related increase in total force complexity (p = .004), older adults exhibited lower complexity of the stochastic force component than young adults did (low frequency: p = .017; high frequency: p = .035). Those older adults with a higher complexity of stochastic force had better task performance due to the underlying use of a richer gradation strategy to compensate for impaired oscillatory control. |
| Databáze: | OpenAIRE |
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