小学生の学校生活における身体活動量と体力に関する研究

　本研究の目的は，小学校6年生の学校生活における活動場面別の身体活動量を加速度計を用いて客観的に測定し，その体力との関係を検討することである．対象は小学校児童85名(男子41名，女子44名)とし，休み時間，体育授業，学校生活全体における歩数と強度別活動時間を評価した．その結果，男女ともに体力上位群は休み時間において歩数とMVPAが多い傾向が示され，特に男子は中休み，女子は昼休みおよび体育授業で有意差が認められた．各活動場面のMVPA が占める割合は休み時間11.3％，体育授業15.7％であり，諸外国と比較して少なく，国際的推奨値にも届かなかった．本研究は，小学校における身体活動量の基礎データを提示するとともに，学校生活，特に休み時間や体育授業における身体活動機会の充実が必要であることを示唆した．

　The purpose of this study was to objectively measure physical activity levels during different school settings among sixth-grade elementary school children using an accelerometer, and to examine their relationship with physical fitness. Participants were 85 children (41 boys, 44 girls). Step counts and time spent in different activity intensities were evaluated during recess, physical education (PE) classes, and the whole school day. Results showed that children with higher fitness levels tended to have greater step counts and more moderate-to-vigorous physical activity (MVPA) during recess. Significant differences were found in morning recess for boys and in lunch recess and PE classes for girls. The proportion of MVPA was 11.3% during recess and 15.7% during PE classes, which was lower than that reported in other countries and did not meet international recommendations. This study provides fundamental data on physical activity in elementary school settings and suggests the importance of enhancing opportunities for physical activity, parti cularly during recess and PE classes.

研究論文