NUTRITION, LIFE -STYL E PRACTICE, SERUM VI TAMIN D CONCENTRATION AND BO NE DENSITY IN HUNGAR IAN ADOLESCENTS

practices were assessed. Body mass and height were measured, bod y mass index was calculated. Serum concentration of 25 -hydroxyvitamin D [25(OH)D ] was determined. Bone mineral density of calcaneus was measured. Protein intake was higher than the Hungarian RDA. All of the students had vitamin D intake far below the RDA, 33.3% of boys and 43.2% of girls had Ca intake below 70% of RDA, and sodium intake was more than twice higher than the RDA. After winter, 2% of boys and 8% of girls were considered vitamin D deficient and 11% and 19% vitamin D insufficient, respectively. A fter summer, 24% of boys and 21% of girls had 25(OH)D level over the reference range. The mineral content of bone was insufficient in 12.9% of boys and 10.4% of girls, respectively. The majority of the students had physical activity only in school, incorpo rated in the timetable.