Objective To investigate the long-term trend of explosive power among Chinese children and adolescents aged 7 to 18 years from 1985 to 2019, predict the status of explosive power in 2029, so as to provide reference for the formulation of future physical health policies. Methods The mean, standard deviation, and sample size data of standing long jump test results for Han Chinese children and adolescents aged 7 to 18 years from the national student physical health surveys conducted between 1985 and 2019 were selected. Descriptive and inferential analysis were conducted using t tests, χ2 tests, development increments, and growth rates. Time series analysis was used to predict the mean explosive power in 2029. Results Over the 34-year period, the overall standing long jump performance of children and adolescents aged 7 to 18 years showed a declining trend. The cumulative decline for urban boys aged 7 to 18 years was 2.24 cm, with a chain growth rate of -1.77%; and for urban girls, the cumulative decline was 0.86cm, with a chain growth rate of -1.12%. For rural boys aged 7 to 18 years, the cumulative decline was 10.83 cm, with a chain growth rate of -2.39%, indicating a relatively large decline; for rural girls aged 7 to 18 years, the cumulative decline was 10.54 cm, with a chain growth rate of -2.84%. The prediction results showed that by 2029, the overall level of explosive strength among Chinese children and adolescents aged 7 to 18 years, both urban and rural, would increase. Conclusion The overall level of explosive power among Chinese children and adolescents declined from 1985 to 2019 but the rate of decline has slowed in recent years, and it is projected to increase by 2029.
Key words
explosive power /
physical fitness monitoring /
time series /
children and adolescents
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