@article{oai:tau.repo.nii.ac.jp:02000001,
 author = {Suganuma, Yusaku and Takahashi, Koki and Sasaki, Shogo},
 journal = {東京有明医療大学雑誌, Journal of Tokyo Ariake University of Medical and Health Sciences},
 month = {Dec},
 note = {Abstract：The aim of this study was to compare the trunk accelerations that occur during competition in elementary schools football between different grade levels. Sixty-two elementary schools football players （grade 6 : 13, grade 5 : 26, grade 4 : 14, grade 3 : 9） played an 8 vs 8 match with a GPS sensor with a built-in 3-axis accelerometer in the middle of the back. The distance traveled in the match, the distance traveled per height, and the frequency of occurrences of composite accelerations of 4 G, 6 G and 8 G or more were extracted and compared for frequency of occurrence by grade using one-way analysis of variance. The results showed that the distance traveled per minute was significantly higher in grades 5 （100.0 ± 10.6 m/min） and 6 （103.2 ± 9.2 m/min） than in grade 3 （89.9 ± 7.3 m/min）, but there was no significant difference in the relative distance traveled divided by height. The difference in the frequency of synthetic acceleration at each of the synthetic acceleration thresholds showed that at 4 G and above, the frequency of synthetic acceleration per minute was significantly higher in grades 5 and below （36.98 ± 10.25 - 38.87 ± 10.14 counts/min） than in grades 6 （20.07 ± 7.71 counts/min）, but not in grades 6 and 8 G （20.07 ± 7.71 counts/min）. No significant differences were found in the frequency of synthetic accelerations above 6 G and 8 G. The phenomenon of a higher frequency of synthetic acceleration in the fifth and lower grades than in the sixth grade suggests that the phenomenon of high impact susceptibility during football activities is captured, and the data may help to prevent Sever’s disease and growth-related disorders, which are more common at around 11 years of age.},
 pages = {1--7},
 title = {Quantitative evaluation of trunk acceleration of elementary-school soccer players using grade measured during competitive matches − Research into the prevention of growth-related injuries －},
 volume = {15},
 year = {2023}
}