Exercise Science (운동과학)

korean Society of Exercise Physiology (한국운동생리학회)
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The Effect of BCAA Administration on the Central Fatigue and Endurance Exercise Capacity

BCAA섭취가 중추피로변인 및 지구성 운동수행 능력에 미치는 효과

Lee, Han;Hong, Mi-Gyeong;Sin, Seon-Ae;Son, Tae-Yeol;An, Ui-Su;Kim, Wan-Su;Hong, Yong
이한;홍미경;신선애;손태열;안의수;김완수;홍용

  • Published : 20020000
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Abstract

The purpose of this study was to estimate the effect of the BCAA(branched-chain amino acid) administration on serotonin and ammonia concentrations that were central fatigue main factors, and endurance exercise capacity during exhaustive endurance exercise. 9 male cycle players of high school were chosen as subjects of this study, and BCAA(78㎎/㎏․w) solved in distilled water 500㎖ were administrated to them and exhaustive endurance exercise was executed by using 70%$VO_2$max intensity to cycle ergometer. Experimental conditions of BCAA and placebo administration were the same and randomized ingestion were used. The time of inserting catheter was earlier agents administration and the blood sampling time were just before agents administration, 50minutes after agents administration, exercise 30 minutes, exhaustion, recovery 30 minutes, 10㎖ blood was taken. Plasma BCAA and BCKA concentrations were significantly increased (p<.05) when BCAA administration, plasma ammonia concentration was increased when BCAA administration but there was not significant. Blood lactate and plasma trytophan concentrations were decreased when BCAA administration but there was not significant, plasma serotonin was significantly decreased(p<.05) when BCAA administration. RPE and exercise time were decreased when BCAA administration but there was not significant.

본 연구는 탈진적인 지구성 운동시 BCAA (Branched -chain amino acid)섭취가 중추피로의 주 요인인 세로토닌 및 암모니아 농도와 지구성 운동수행능력에 미치는 효과를 실험적으로 구명하는데 목적을 두었다. 실험대상자는 고등학교 싸이클 선수 9명으로 각 피험자의 70%$VO_2$max의 강도로 자전거 에르고메터를 이용하여 탈진시까지 운동을 실시하였으며, BCAA는 피험자의 체중당 78mg을 역삼투수 500㎖에 용해시켜 구강 섭취하였다. BCAA와 위약섭취시기의 실험조건을 동일하게 하였으며, BCAA와 위약을 교차하여 섭취하는 무작위처치를 이용하였다. 채혈은 카테터를 전완정맥에 삽입하여 제재섭취전, 제재섭취 50분 후, 운동중 30분, 운동직후(탈진) 및 회복기 30분에 각각 10㎖씩 채혈하였다. 혈장 BCAA 및 BCKA의 농도는 BCAA섭취 시 유의하게 증가한 것으로 나타났으며, 혈장 암모니아 농도는 운동시 BCAA섭취에서 증가하였지만 유의한 차이를 나타내지는 않았다. 혈중 젖산 및 혈장 트립토판의 농도는 BCAA섭취 시 감소하였으나 유의한 차이는 없었으며, 혈장 세로토닌 농도는 BCAA섭취 시 유의하게 감소한 것으로 나타났다. 또한, 주관적 운동강도(RPE) 및 지구성 운동수행시간은 BCAA섭취 시 증가하였으나 유의한 차이는 나타나지 않았다.

Keywords

References

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