過剰体重および肥満児における運動用量と糖尿病リスク:ランダム化制御試験
Catherine L Davis1, Norman K Pollock, Jennifer L Waller
1Georgia Prevention Center, Institute for Public and Preventive Health, Department of Pediatrics, Medical College of Georgia, 1120 15th St, Ste 1640, Augusta, GA 30912, USA. cadavis@georgiahealth.edu
JAMA
|September 20, 2012
まとめ
肥満児のエアロビック運動は,フィットネスを大幅に改善し,インスリン抵抗性と体脂肪を減少させた. 1日20分と40分の両方が効果を示し,より高い用量は代謝の健康にわずかに大きな改善をもたらしました.
科学分野:
- 小児運動科学科 運動科学科
- 子供の代謝健康について
- 肥満とフィットネス研究
背景:
- 小児の有酸素運動は,代謝リスクを減らすことが知られている.
- 運動と子供の代謝健康の間の用量反応関係に関するデータは限られている.
研究 の 目的:
- 肥満で静止状態の子供のインスリン抵抗性,体脂肪,内臓脂肪,フィットネスに対するエアロビックトレーニングの異なる用量の影響を評価する.
- 性別や人種によるこれらの効果の潜在的緩和を調査する.
主な方法:
- ランダム化制御試験で,222人の体重過多/肥満の座っている子ども (平均年齢9.4歳) が参加した.
- 参加者は,低用量 (20分/日),高用量 (40分/日) のエアロビックトレーニング,または13週間の対照グループに割り当てられました.
- プライマリアウトカムには,曲線下にあるインスリン領域 (AUC),エアロビックフィットネス (酸素消費のピーク),体脂肪のパーセント,内臓脂肪が含まれていました.
主要な成果:
- 低用量 (20分/日) と高用量 (40分/日) のエアロビックトレーニングは,対照群と比較して,インスリンAUC,体脂肪,内臓脂肪を大幅に低下させた.
- フィットネスレベル (ピーク酸素消費量) も,両方のトレーニンググループで著しく改善しました.
- 高用量群と低用量群の間で有意な差異は認められず,効果は性別や人種によって一貫していました.
結論:
- 13週間にわたって毎日20分または40分のエアロビックトレーニングは,肥満/肥満児のフィットネスと代謝健康を効果的に改善します.
- この研究では,インスリン抵抗性および肥満に対する用量反応の利点が示され,試験された2つの用量間の有意な違いは認められなかった.
- これらの利点は,子供の性別や人種に関係なく観察されました.
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