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3 results on '"Zhao, Panchao"'

1. Effects of Task Interference on Kinematics and Dual-Task Cost of Running in Early Childhood.

Author

Zhao P, Ma K, Ji Z, and Jiang G

Subjects
Child, Humans, Child, Preschool, Biomechanical Phenomena, Cognition, Motor Skills, Walking, Gait
Abstract

Children aged 3-8 are in a critical period for motor development and postural control. Running is a basic motor skill that children need to master in early childhood. While running, children are prone to dangerous events such as falls. This study investigates the kinematic characteristics of running by children associated with different interference tasks, i.e., normalized running, cognitive dual-tasks, and obstacle crossing tasks, and provides a theoretical foundation for the interference mechanism of children's dynamic postural control and for screening of motor disorders. Two hundred children aged 3-8 were recruited. The BTS Bioengineering infrared motion capture system was used to collect spatiotemporal and kinematic running data under three tasks. Repeated measures of variance analysis were used to compare the effects of different interference tasks and ages on children's running signs. The main and interaction effect tests were compared by the Bonferroni method. The results and conclusions are as follows: (1) Running characteristics of early childhood are influenced by interference tasks and age. With interference tasks, the overall characteristics of running by children aged 3-8 showed an increasing trend in running cycle time and a decreasing trend in stride length, step length, cadence, and speed. (2) Both cognitive and obstacle crossing tasks had costs, and cognitive task costs were greater than obstacle crossing costs. Children adopted a "task first" running strategy with different interference tasks. When facing cognitive tasks, their overall joint motion decreased, and they reduced joint motions to promote task completion. When facing obstacle crossing tasks, because of the characteristics of the task itself, children increased joint motions to cope with interference. (3) In terms of age, the running characteristics showed a nonlinear development trend in various indicators, with a degree of recurrence and high variability in adjacent age groups. (4) The dual-task interference paradigm of "postural-cognition" can be used as a motor intervention tool to promote the development of basic motor skills in early childhood.

Published
2024
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2. A Biomechanical Study of Young Women in High Heels with Fatigue and External Interference

Author

Zhao, Panchao, Ji, Zhongqiu, Diniz Junqueira Barbosa, Simone, Series editor, Chen, Phoebe, Series editor, Filipe, Joaquim, Series editor, Kotenko, Igor, Series editor, Sivalingam, Krishna M., Series editor, Washio, Takashi, Series editor, Yuan, Junsong, Series editor, Zhou, Lizhu, Series editor, Zou, Beiji, editor, Han, Qilong, editor, Sun, Guanglu, editor, Jing, Weipeng, editor, Peng, Xiaoning, editor, and Lu, Zeguang, editor

Published
2017
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3. Biomechanical characteristics of walking and running in children aged 3-6 years

Author

Zhao Panchao, Jiang Guiping, Wen Ruixiang, and Ji Zhongqiu

Subjects
medicine.medical_specialty, Flexion angle, Computer science, 020206 networking & telecommunications, 02 engineering and technology, Kinematics, Gait, Physical medicine and rehabilitation, medicine.anatomical_structure, Hip extension, Coronal plane, 0202 electrical engineering, electronic engineering, information engineering, medicine, General Earth and Planetary Sciences, 020201 artificial intelligence & image processing, Force platform, Ankle, Motor skill, General Environmental Science
Abstract

Objective: Biomechanical methods were used to explore the influence of age and gender on children’s motor characteristics, and the internal muscle strength were calculated through simulation modeling, so as to provide ideas for the screening of children with diseases and promotion of motor development. Method: BTS motion capture system collects kinematics data; Kistler force platform collects dynamic data, the simulation software(Anybody 5.2)calculates the muscle strength of the lower limb, two-way ANOVA was performed for difference test. Results: gait: SB, SD, SDI and TA muscle strength increased gradually. GMIP muscle strength: 4 years old group is greater than 3-years-old group. SDI and TFL strength: boys’ were greater than girls’. Running: GM muscle strength: boys’ are greater than girls’. PB muscle strength: the 3-year-old group has smallest muscle strength. GMAS muscle strength: the 3-year-old group has the largest muscle strength, boys’ are greater than girls’. Conclusions: (1) Walking: At the striking time, the buffering capacity of ankle is enhanced gradually. At the moment of lifting off the ground, the range of ankle stretching increased gradually, The angular velocity characteristics has a gender difference. The development of hip flexor muscle strength was uneven between boys and girls. The cushioning muscle strength of the ankle was greater in the 5-year-old group.(2) There were gender differences in time parameters of running. The flexion angle of the ankle was larger at the striking time, which was related to different striking patterns. At the time off-the-ground, the 5-year-old group had the largest hip extension angle. Younger children used more frontal plane joint movement and more hip abductor force.

Published
2021

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