The prevalence of overweight has increased substantially in Japan during the
past decade and it continues to rise. According to recent statistics, 30% of
the Japanese adult population meets the current definition of overweight (body
mass index [BMI] 25 kg/m2
).1 Obesity is a problem not only in the Western
world but also in Japan. It is well accepted that obesity is a risk factor for type
2 diabetes, coronary heart disease, and hypertension. 2–13 Several studies, however,
have shown that measurement of overall adiposity or body weight, such
as with BMI, may not adequately describe the relationship of body fat to
disease.14 It appears that visceral fat area (VFA) more fully explains this
relationship. 15,16 The clustering of hyperinsulinemia, dyslipidemia, type 2 diabetes
mellitus, and hypertension is called the insulin resistance syndrome or metabolic
syndrome, and syndrome X.
17 Accordingly, evaluation of obesity for the
prevention of syndrome X must be conducted using not only body weight or
BMI but also VFA. Incidentally, it has been reported that a high-carbohydrate
(sucrose) diet increases visceral fat accumulation in rats. 18 Therefore, controlling
the surplus energy from a high-carbohydrate diet is expected to be effective
in preventing the accumulation of visceral fa
The prevalence of overweight has increased substantially in Japan during thepast decade and it continues to rise. According to recent statistics, 30% ofthe Japanese adult population meets the current definition of overweight (bodymass index [BMI] 25 kg/m2).1 Obesity is a problem not only in the Westernworld but also in Japan. It is well accepted that obesity is a risk factor for type2 diabetes, coronary heart disease, and hypertension. 2–13 Several studies, however,have shown that measurement of overall adiposity or body weight, suchas with BMI, may not adequately describe the relationship of body fat todisease.14 It appears that visceral fat area (VFA) more fully explains thisrelationship. 15,16 The clustering of hyperinsulinemia, dyslipidemia, type 2 diabetesmellitus, and hypertension is called the insulin resistance syndrome or metabolicsyndrome, and syndrome X.17 Accordingly, evaluation of obesity for theprevention of syndrome X must be conducted using not only body weight orBMI but also VFA. Incidentally, it has been reported that a high-carbohydrate(sucrose) diet increases visceral fat accumulation in rats. 18 Therefore, controllingthe surplus energy from a high-carbohydrate diet is expected to be effectivein preventing the accumulation of visceral fa
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