Furthermore, although obesity (being more than twenty percent over a healthy weight) is a predisposing factor in high blood pressure, diabetes and other illnesses, specialists have discovered that yo-yo dieting--a cycle of drastic dieting and overeating, where body weight goes up and down quickly, as though it were sunny one minute and snowing the next inside the body-has even worse effects on health.
再說，體重過重（超過健康體重百分之二十以上）雖是高血壓、糖尿病等疾病的誘發因素，但專家發現，反反覆覆的激烈節食又失敗，體重忽高忽低，好像身體內部一會兒晴天，一會兒下雪，對健康的摧殘更是可怕。