엘리트 트라이애슬론 선수의 모의경기 중 수분섭취 양상과 체수분 균형 및 염증반응
Fluid Intake, Body Water Balance, and Inflammatory Responses during Simulated Olympic Distance Triathlon in Elite Triathletes
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초록
이 연구는 국가대표급 엘리트 트라이애슬론 남녀 8명의 선수가 모의경기 중 손실되는 체중량에 대응해 어느 정도의 수분을 섭취하는지 관찰하고, 경기 중 체수분이 어떻게 유지되는지 평가하는데 목적을 두었다. 전국체전을 대비한 훈련 기간 중 모의경기가 진행되었으며 7:30에 기상하여, 10:30 경기가 시작되었다. 경기 전과 후 체중, 뇨비중이 측정되었고 혈액샘플이 채취되었다, 그리고 경기 중 심박수와 경기기록, 음료섭취량과 체온이 측정되었다. 측정변인들을 이용해 땀량이 환산되었으며, 혈액은 대사(젖산, 혈당, lactate dehydrogenase), 전해질(Na+, K+, Cl-, Ca++), 체수분(혈장삼투농도, total protein, albumin, total bilirubin, uric acid, creatinine, hematocrit, hemoglobin), 면역 및 염증(creatine kinase; c-reactive protein, 백혈구, 혈소판)변인을 측정하는데 사용되었다. 결과적으로 경기를 통해 유실되는 총체중은 약 1.2±0.6kg으로 나타났으며, 이는 체중 약 2%에 해당했다. 수영시간을 제외한 땀량은 약 1.15±0.26kg/hr 로 나타났다. 경기 전에 비해 경기 후에 젖산, Na+, Ca++, 혈장삼투질, 단백질 변인의 농도가 증가하였다. 면역 및 염증 지표들도 상승하였다. 결론적으로 경기 중 체중은 급격하거나 현저하게 저하되지 않았으며 이는 수분보충으로 가능하였다. 경기를 통하여 혈중 대사부산물이 증가하였고 전해질 농도 상승과 혈장내 삼투압과 단백질압력이 증가하였다. 상해 염증성 지표들은 상승하는 양상을 보였으나 급작스런 변화는 관찰되지 않았다.
Abstract
This experiment was designed to examine the fluid intake pattern against body weight loss during simulated Olympic Distance triathlon race in eight National Squad caliber elite triathletes, and to evaluate how the body water was maintained during the race. During a training period for the National Sports Festival, triathletes got up at 7:30 and started the race at 10:30 similar to the actual game. Before and after the race, their body weight, urine specific gravityhb was measured and blood samples were collected. During the race, heart rate, race time, the amount of fluid intake and body temperature were measured. Sweat rate was calculated. Blood samples were analyzed for lactate, glucose, lactate dehydrorenase, sodium, potassium, chloride, and calcium ions, osmolality, total protein, albumin, total bilirubin, uric acid, creatinine, hematocrit, hemoglobin, creaine kinase, c-reactive protein, white blood cell counts, and platelet. After the race, they lost 1.2±0.6kg of total body weight, t rivalent to 2% of loss from the baseline. Sweat rate (except swimming phase) was 1.15±0.26kg/hr. After the race, lactate, Na+, Ca++, osmolality, blood protein variables were increased compared to before the race. The inflammatory index was also elevated. Based on the results, the body weight did not changed abruptly and marginally and this could be possible due to fluid rehydration during the race. After the race, metabolic by-product was elevated and electrolytes and plasma osmolality as well as oncotic pressure were elevated. Generally, inflammatory index was elevated but not acutely.
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