Abstract
The purpose of this study is to verify the relation among vegetarian diet, physical activity and the risk factors of cardiovascular disease. Two hundred and forty five buddhist nuns (age : 23~79 yrs) were selected as vegetarians. For control subjects, 235 healthy female adults (age : 23~79 yrs) were selected. Study period was from October 1996 to February 1997. The contents are consist of food consumption survey, anthropometric measurement, amount of energy expenditure, physical activity and clinical examination. Results were summarized as follows : The average ages of vegetarians were $44.2{\pm}17.3\;yrs$ and those of non-vegetarians were $40.5{\pm}18.4\;yrs$. Average body mass indices (BMI) of vegetarians and non-vegetarians were $22.5{\pm}2.7\;and\;21.1{\pm}2.5$, WHRs were $0.9{\pm}0.1\;and\;0.8{\pm}0.1$, and the average duration of vegetarian diet of the vegetarians was 13.1{\pm}12.9 years. All the nutrient intakes of both groups were over RDA's except calcium and vitamin A intakes of non-vegetarians that were below RDA's Fiber and vitamin C intakes of the vegetarians were significantly higher than those of non-vegetarians (p<0.01). Average energy intakes of vegetarians and non-vegetarians were $2177.1{\pm}420.6\;kcal/day\;and\;2103.2{\pm}534.9\;kcal/day$, total daily energy expenditure were $1789.9{\pm}325.8\;kcal/day\;and\;1703.8{\pm}344.8\;kcal/day$, those by physical activity were $507.8{\pm}360.9\;kcal/day\;and\;400.0{\pm}247.8\;kcal/day$. Serum lipid level, blood sugar, systolic blood pressure of vegetarians were significantly lower than those of non-vegetarians, but ratio of HDL-cholesterol/total-cholesterol was higher than those of non-vegetarians. Levels of total serum cholesterol of vegetarians and non-vegetarians were 161.4{\pm}33.3 mg/dL and 189.6{\pm}33.6mg/dL, HDL-cholesterol were $48.2{\pm}11.4\;mg/dL\;and\;50.8{\pm}12.2\;mg/dL$, LDL-cholesterol were $86.6{\pm}26.9\;mg/dL\;and\;111.1{\pm}17.0\;mg/dL$, atherogenic indice(AI) were $2.4{\pm}0.6\;and\;2.9{\pm}0.7$, fasting blood sugar were $90.8{\pm}14.3\;mg/dL\;and\;103.6{\pm}24.6\;mg/dL$, systolic blood pressure were $107.5{\pm}14.9\;mmHg\;and\;119.3{\pm}15.3\;mmHg$. Energy expenditure by physical activity was negatively correlated with levels of serum total-cholesterol and LDL-cholesterol and atherogenic indice(AI). Therefore, physical activity and vegetarian diet effectively helped reduce blood lipids related to cardiovascular disease.
우리나라에도 심혈관질환으로 인한 사망률이 점차 증가하고 있다. 이에 본 연구에서는 채식과 심혈관질환과의 관계를 규명하기 위한 연구의 일환으로 채식을 하는 비구니스님을 대상으로 하여 연구한 결과를 요약하면 다음과 같다. 조사 대상자의 평균나이는 채식인 44.20세, 비채식인 40.52세, BMI는 각각 22.47, 21.08이었고, WHR은 0.85, 0.84였고, %BF는 28.79, 26.55였으며, 채식인의 평균채식기간은 13.16년이었다. 조사 대상자의 영양소 섭취실태는 채식인은 모든 영양소가 권장량을 상회하였고, 비채식인은 Ca, 비타민 A가 권장량을 미달하였다. 섬유소와 비타민 C 섭취량은 채식인이 유의적으로(p<0.01) 높았다. 조사 대상자의 소비에너지는 채식군 1789.84 kcal, 비채식군 1703.83 kcal로 채식군이 유의하게 많았고(p<0.05), 활동량도 채식군 507.76 kcal, 비채식군 400.03 kcal로 채식군이 유의하게 높았다(p<0.01). 조사 대상자의 total cholesterol, LDL-cholesterol, AI, 이완기혈압 및 혈당은 비채식인이 유의적으로(p<0.01) 높았고, HDL-cholesterol은 (p<0.05) 비채식인이 유의적으로 높았으며 심질환 예견지수인 HDL/total cholesterol 비는 채식인이 유의적으로(p<0.01) 높았다. 활동량은 두군 모두 중성지방, 혈청 총 콜레스테롤, LDL-cholesterol, AI와는 역상관을 보였다(p<0.05). 이상의 결과에서 채식군은 비채식군에 비해 혈중지질 수준, 혈당, 혈압에 영향을 미치는 것으로 알려진 BMI, RBW, WHR,%BF가 유의적으로 높았음(p<0.05)에도 불구하고 혈정 총콜레스테롤, LDL-choleserol, AI 및 수축기혈압이 유의적으로 낮았는데 이는 여러가지 요인이 있겠지만 채식군이 비채식군에 비해 섬유소, 비타민 C의 섭취량 및 활동량이 유의하게(p<0.01) 높았기 때문으로 생각된다. 따라서 혈중지질 수준, 혈당, 혈압에 영향을 미치는 것은 식이요인 뿐만 아니라 활동량 등 여러가지 생활양식이 영향을 미치는 것으로 볼 수 있다.