The objective of this study is to observe the effect of 12 weeks of physical fitness training on the physical fitness of primary school students.Methods:Two students in the fourth grade of a primary school in Harbin were divided into physical fitness training group(intervention group)and regular physical education group(control group),with 40 students in each group.The intervention was held twice a week for 40 minutes for 12 weeks.Both groups were tested for physical fitness before and after the intervention.Results:Before the experiment,there was a significant difference in waist circumference(p＜0.05)between the two groups,a high significance difference(p＜0.01)between the two groups and a 20-second round trip,and no significant difference(p＞0.05)between the two groups.In the experimental group,height,weight,waist circumference,20-meter round trip,left-handed grip strength,30s sit-ups,standing long jump,sitting forward bending,50-meter running,20s repeated span had highly significant differences(p＜0.01),and BMI and right-handed grip strength had significant differences(p＜0.05).There were significant differences in height,weight,20m round trip,30s sit-ups,sitting forward flexion,and 20s repeated span in the control group(p＜0.01).There were highly significant differences in waist circumference,20-meter round trip,left and right hand grip strength,50-meter running,and 20s repeated span changes(p＜0.01),and BMI differences(p＜0.05).Conclusion:Physical fitness training based on LTAD model has a significant effect on promoting physical health of primary school students.
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