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Dietary Intake, Anthropometric Characteristics, and Iron and Vitamin D Status of Female Adolescent Ballet Dancers Living in New Zealand.
- Source :
- International Journal of Sport Nutrition & Exercise Metabolism; Aug2015, Vol. 25 Issue 4, p335-343, 9p, 4 Charts
- Publication Year :
- 2015
-
Abstract
- Ballet dancing is a multifaceted activity requiring muscular power, strength, endurance, flexibility, and agility; necessitating demanding training schedules. Furthermore dancers may be under aesthetic pressure to maintain a lean physique, and adolescent dancers require extra nutrients for growth and development. This cross-sectional study investigated the nutritional status of 47 female adolescent ballet dancers (13-18 years) living in Auckland, New Zealand. Participants who danced at least 1 hr per day 5 days per week completed a 4-day estimated food record, anthropometric measurements (Dual-energy X-ray Absorptiometry) and hematological analysis (iron and vitamin D). Mean BMI was 19.7 ± 2.4kg/m² and percentage body fat, 23.5 ± 4.1%. The majority (89.4%) of dancers had a healthy weight (5th-85th percentile) using BMI-for-age growth charts. Food records showed a mean energy intake of 8097.3 ± 2155.6kJ/day (48.9% carbohydrate, 16.9% protein, 33.8% fat, 14.0% saturated fat). Mean carbohydrate and protein intakes were 4.8 ±1.4 and 1.6 ± 0.5g/kg/day respectively. Over half (54.8%) of dancers consumed less than 5g carbohydrate/kg/day, and 10 (23.8%) less than 1.2 g protein/kg/day. Over 60% consumed less than the estimated average requirement for calcium, folate, magnesium and selenium. Thirteen (28.3%) dancers had suboptimal iron status (serum ferritin (SF) <20µg/L). Of these, four had iron deficiency (SF < 12µg/L, hemoglobin (Hb) ≥120g/L) and one iron deficiency anemia (SF < 12µg/L, Hb < 120g/L). Mean serum 25-hydroxy vitamin D was 75.1 ± 18.6nmol/L, 41 (91.1%) had concentrations above 50nmol/L. Female adolescent ballet dancers are at risk for iron deficiency, and possibly inadequate nutrient intakes. [ABSTRACT FROM AUTHOR]
- Subjects :
- BALLET
BASAL metabolism
BODY composition
C-reactive protein
DEMOGRAPHY
FERRITIN
HEMOGLOBINS
INGESTION
IRON
NUTRITIONAL requirements
PROJECTIVE techniques
QUESTIONNAIRES
RESEARCH funding
STATISTICAL sampling
MICRONUTRIENTS
VITAMIN D
WOMEN athletes
BODY mass index
CROSS-sectional method
FOOD diaries
DATA analysis software
DESCRIPTIVE statistics
NUTRITIONAL status
ADOLESCENCE
Subjects
Details
- Language :
- English
- ISSN :
- 1526484X
- Volume :
- 25
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- International Journal of Sport Nutrition & Exercise Metabolism
- Publication Type :
- Academic Journal
- Accession number :
- 109423790
- Full Text :
- https://doi.org/10.1123/ijsnem.2014-0089