主办单位:成都体育学院
ISSN 1001-9154 CN 51-1097/G8

Journal of Chengdu Sport University ›› 2021, Vol. 47 ›› Issue (2): 65-70.doi: 10.15942/j.jcsu.2021.02.011

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A Study on the Locomotion Development and Neuromuscular Control of Children Aged 4~6

HU Xin1, JI Zhongqiu1, JIANG Guiping1, PANG Bo1, HUANG Haojie2   

  1. 1. College of P.E. and Sports, Beijing Normal University,Beijing 100875;
    2. Dept. of P.E, Xiamen University, Xiamen Fujian 361005
  • Received:2019-11-24 Revised:2020-08-25 Online:2021-03-15 Published:2021-03-26

Abstract: Objective: To study the external manifestations of locomotion development and the underlying mechanism of neuromuscular control in children aged 4-6. Methods: TGMD-3 was used to evaluate running, hopping and jumping. The BTS surface electromyography test system was used to analyze the iEMG and timing. ANOVA was used to analyze the differences in the development level of locomotion at different ages, and calculate the influence of age groups×different muscles on Normalize Integrated Electromyography (N-iEMG), and the influence of age group×motor types on Normalized Co-Contraction Index (NCCI).Results: There were age differences in the locomotion development level andN-iEMG value of lower limb muscles in children aged 4-6, and the difference in hopping was the most obvious (P<0.05). The N-iEMG value of the rectus femoris is the largest, followed by the tibialis anterior muscle. As the age increases and the complexity of movement decreases, the peaks of the NCCI-rectus femoris/biceps femoris and NCCI-tibialis anterior/gastrocnemius co-contraction index become larger. Conclusion: TGMD-3 is feasible as an evaluation tool for children's movement development. single-foot jumping can be given priority as a qualitative evaluation index for locomotion skills. The iEMG value of lower limb muscles can be used as a representative index for quantitative evaluation. When children are running, hopping and jumping, the main muscles that they use are the rectus femoris and tibial anterior muscles as age increases, the iEMG value gradually increases and the coordination of the muscles around the knee and ankle joints gradually increases when completing locomotion.

Key words: children, locomotion, neuromuscular control, SEMG, iEMG

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