수분 및 탄수화물-전해질 음료보충이 고온환경에서 장시간 운동시 스트레스 호르몬에 미치는 영향 = The Effects of Fluid Ingestion on Stress Hormones during Prolonged Exercise in the Heat

다국어 초록 (Multilingual Abstract)

The purpose of this study was to analyze the effects of fluid ingestion on stress hormones during prolonged exercise in high temperatures, mainly at 32℃ with relative humidity 61±3%.
Under these fixed conditions, eight heathy university male students performed on the bicycle ergometer at 60% V0_2max for 120 minutes.
For comparison and evaluation, the study was divided into three cases 1, without any fluid intake 2, with water intake 3, with carbohydrate-electrolyte fluid intake(all performed at the same exercise intensity and time conditions noted above).
1.Case one 0 without fluid Venous blood samples were drawn at intervals a. prior to the exercise b. during the exercise c. directly after the exercise session.
2-3. Case two & three - with fluid intake
mesured fluid was ingested every 15 min and venous blood samples were drawn at the intervals noted above.
The results of the study is summarized as follows:
A. Without Fluid
1)Highest increase rate in ACTH and Cortisol
2)High increase in Epinephrine and Norepinephrine
B.With Water intake
1)Middling increase rate in ACTH and Cortisol
2)High increase in Epinephrine and Norepinephrine
C.With Carbohydrate-electrolyte fluid intake
1)Lowest increase rate in ACTH and Cortisol
2)High increase in Epinephrine and Norepinephrine
The results from the study indicate in each case, an increase in ACTH, Cortisol, Epinephrine, and Norepinephrine at assessed times. However, the rise in the stress hormone level was distinctively lower when fluid(water or carbohydrate-electrolyte)was consumed.
There was no relationships between fluid ingestion and assessed times.
The obtained analysis leads to the conclusion that fluid ingestion during prolonged exercise in the heat is required for physiological, biochemical normalization and homeostasis of human body.