Lidwien van der Heijden

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To investigate changes in the thermic effect of a meal (TEM) during pregnancy, metabolic rate was measured in the fasting state and during the first 180 min after consumption of a standardized test meal in twenty-seven women before, and in each trimester of pregnancy. Resting metabolic rate (RMR) showed a steady increase over pregnancy: values in weeks 24(More)
Energy metabolism was measured in 24 women before pregnancy and during lactation (2 mo postpartum). Resting metabolic rate (RMR) increased by 0.17 +/- 0.38 kJ/min and postprandial metabolic rate (PPMR) showed a similar increase (0.17 +/- 0.45 kJ/min). Thus, the thermic effect of the meal (PPMR minus RMR) was not affected by lactation. Between subjects, the(More)
After an initial 4-wk period, 36 healthy male subjects aged 19-28 y (14 lactoovovegetarians and 22 omnivores) were given a supplement to their usual diet of 27.9 mmol calcium/d for 5 wk. During this period 22 blood pressure measurements were taken and 30 24-h urine specimens and 15 24-h dietary records were obtained. Base-line blood pressures did not differ(More)
We have studied the within-person variability in the excretion of sodium, potassium, calcium, magnesium and creatinine in 20-60-year old men and women from 8 European centres. Only the data from people who reported that their collections were complete were entered in the analysis. The within-person coefficients of variation for the electrolytes ranged from(More)
To investigate changes in energy metabolism during pregnancy, complete 8-d energy balances were measured before pregnancy and at 12, 23, and 34 wk gestation in 12 healthy Dutch women. While for each individual woman experimental diets were kept constant throughout the study with average intakes of 8.76 +/- 0.92 MJ/d (before pregnancy), 8.72 +/- 1.08 MJ/d(More)
We studied the excretion of sodium, potassium, calcium, magnesium, and creatinine in overnight and 24-h urines collected over a period of seven consecutive days from 28 Dutch boys, ages eight and nine years. The correlation coefficients for the relation between true mean overnight and true mean 24-h excretion ranged between 0.94 and 1.00 for sodium,(More)
OBJECTIVE To investigate whether work efficiency improves during pregnancy. DESIGN Longitudinal; energy expenditure measurements (ventilated hood system) before the onset of pregnancy and in weeks 13, 24 and 35 of gestation. SUBJECTS Healthy Dutch women (n = 26), recruited with advertisements in local newspapers and posters displayed in public(More)
BACKGROUND Anemia is a significant public health problem among schoolchildren in Vietnam. Food fortification is considered one of the most sustainable long-term strategies to control iron-deficiency anemia in Vietnam. The success of a food-fortification program depends on the choice of the food vehicle. OBJECTIVES The aim of the present study was to(More)
In ninety-four Dutch nulliparous women the effects of a low-Na diet in pregnancy on blood pressure, energy and nutrient intake, Ca metabolism, Zn and Mg status and body composition were studied longitudinally. The women were randomly divided into an intervention group (n 41), which used a low-Na diet (mean urinary Na excretion 61 mmol/24 h) from week 14 of(More)
On the basis of their usual calcium intake, 12 healthy normotensive male students were divided into a low and a high calcium group. Both groups were provided with complete diets containing the same calculated quantities, expressed per MJ, of protein, fat, carbohydrate, sodium, potassium, phosphorus, and calcium. After an initial period of two weeks during(More)
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