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本研究は,大阪府下のスポーツ系専門学校生女子5名を対象に,運動前に摂取した市販の分岐鎖アミノ酸を多量に含むアミノ酸飲料が,有酸素運動中の生体にどのような影響を及ぼすかについて検討することを目的にとした。その結果、運動中の酸素摂取量はアミノ酸飲料摂取により他の飲料に比べ開始から低い値を示した。また,アミノ酸飲料の運動前の飲水により運動直後の血中乳酸濃度の上昇率が抑えられることが認められた。さらに主観的運動強度は他の飲料に比べてアミノ酸飲料摂取でより低い値を示した。以上の結果より,運動前のアミノ酸飲料の摂取は運動効率の向上,血中乳酸濃度上昇抑制,疲労の軽減などの効果が期待できるものと示唆された。, The purpose of this study was to investigate the effects of amino acid drink which contains so much the branch chain amino acid on physical activity during aerobic exercise in college students. As a results, the amount of maximum oxygen uptake during exercise showed the low value compared with other drinks by amino acid drink ingestion. It was admitted that the increasing rate of the blood lactic acid concentration immediately after movement was stopped with the drinking of an amino acid drink before exercise. The rate of perceptive exertion showed the lower value by amino acid drink ingestion compared with other drinks. In conclusion, it was suggested that amino acid drink ingestion before the exercise was expected effects such as improvement in movement efficiency, control of" blood lactate acid concentration and mitigation of fatigue.