激しいサイクリング中の炭水化物配分のパフォーマンスへの影響なし
International journal of sport nutrition and exercise metabolism
|December 30, 2025
まとめ
持久力サイクリング中の炭水化物摂取タイミングは、パフォーマンスに有意な影響を与えなかった。摂取量の減少パターンは、運動後半の燃料使用と胃腸の快適さを改善する可能性があるが、一般的には均等な摂取が推奨される。
科学分野:
- スポーツ科学と運動生理学
- 栄養生化学
背景:
- 炭水化物摂取の最適化は、持久力アスリートにとって非常に重要である。
- 異なる摂取パターンは、燃料利用と胃腸の快適さに影響を与える可能性がある。
研究 の 目的:
- 増加、減少、および一定の炭水化物摂取パターンがサイクリングパフォーマンスと胃腸の快適さに及ぼす影響を調査すること。
- 炭水化物の利用可能性を内因性貯蔵と一致させることが結果を最適化するという仮説を検証すること。
主な方法:
- 12人の訓練された男性サイクリストが3つのランダム化試験を完了した。
- 試験には、180分間の断続的サイクリング前負荷、15分間の全力テスト、および最大スプリントが含まれた。
- 参加者は、増加、減少、または一定のパターンで90 g/時 の炭水化物を摂取した。
主要な成果:
- 炭水化物の配分パターンは、15分間の全力走行パフォーマンスまたは疲労までの時間に有意な影響を与えなかった。
- 炭水化物の酸化は、一定または増加パターンと比較して、減少パターンで高かった。
- 胃腸の不快感(吐き気やけいれんを含む)は、増加パターンで経時的に増加し、減少パターンと比較して増加した。
結論:
- 炭水化物摂取の配分は、全体的な持久力サイクリングパフォーマンスにほとんど影響を与えない。
- 減少炭水化物摂取パターンは、長時間の運動中の基質酸化と胃腸の快適さを向上させる可能性がある。
- 均等な炭水化物摂取が一般的に推奨されるが、個々の許容度によっては不均等なパターンでも許容される可能性がある。
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