(Hypertension. 1996;27:408-413.)
© 1996 American Heart Association, Inc.
Articles |
Factors That Affect Calorie-Sensitive and Calorie-Insensitive Reduction in Blood Pressure During Short-term Calorie Restriction in Overweight Hypertensive Women
From the Second Department of Internal Medicine, Iwate Medical University, Morioka, Japan.
Correspondence to Minoru Kawamura, MD, Second Department of Internal Medicine, Iwate Medical University, Uchimaru 19-1, Morioka, Iwate, 020 Japan.
Abstract This study was performed to elucidate the factors that affect the reduction in blood pressure produced by calorie restriction in overweight women with essential hypertension. Fifty-one subjects were admitted to the metabolic ward of the hospital. After being fed a standard diet (6.3 to 8.4 MJ/d) for 2 weeks, the calorie-restricted group (n=34) was fed a low-calorie diet (1.9 MJ/d) for an additional 2 weeks. The calorie-nonrestricted group (n=17) was fed the standard diet for 4 weeks. Sodium and potassium intake was kept constant, as was the level of exercise activity. The calorie-restricted group was subdivided into "calorie-sensitive" and "calorie-insensitive" groups based on an average 5 mm Hg reduction in mean blood pressure during the low-calorie diet. The mean age was 51±6 years (mean±SD) in the calorie-sensitive group (n=16), which was significantly lower than the mean age of 61±6 years in the calorie-insensitive group (n=18). Multiple regression analysis indicated that age and change in body weight exhibited significant correlations with blood pressure reduction produced by calorie restriction among 17 parameters. Findings suggest that age can predict the extent of blood pressure reduction that would be obtained during 2 weeks of calorie restriction in overweight hypertensive women. The reduction in blood pressure may be related in part to the amount of weight loss.
Key Words: hypertension, essential • weight loss • calorie restriction • low-calorie diet • age • sodium balance