Abstract
ABSTRACT Objective To analyze if aerobic capacity is related to Birth Weight and breastfeeding patterns in boys and girls, products of a term pregnancy and normal weight. Methods A representative sample of 230 Brazilian children (6-10 years old), born at term (after 37-weeks’ gestation) with normal weight (between 2.5 and 4.0kg). These children performed a Yo-Yo Test to estimate their aerobic capacity and mothers reported their children’s Birth Weight and breastfeeding patterns. The Pearson correlation coefficient was used to measure the association between aerobic capacity with Birth Weight and breastfeeding patterns. Results We did not observe any significant associations between aerobic capacity with Birth Weight and breastfeeding time in either sexes (p>0.05). Conclusion These results indicate that aerobic capacity is not related with Birth Weight or breastfeeding time in children born with normal weight and gestational age, suggesting that this complex physiological parameter does not appear to be determined by intrauterine factors that dictate the Birth Weight and breastfeeding patterns in the beginning of life.
Highlights
Aerobic capacity or cardiopulmonary fitness is measured by Maximal Oxygen Uptake (VO2max) and reflects the efficiency of all metabolic machinery in capturing, transporting and using oxygen in order to produce muscular work [1,2]
We did not observe any significant associations between aerobic capacity with Birth Weight and breastfeeding time in either sexes (p>0.05)
These results indicate that aerobic capacity is not related with Birth Weight or breastfeeding time in children born with normal weight and gestational age, suggesting that this complex physiological parameter does not appear to be determined by intrauterine factors that dictate the Birth Weight and breastfeeding patterns in the beginning of life
Summary
Aerobic capacity or cardiopulmonary fitness is measured by Maximal Oxygen Uptake (VO2max) and reflects the efficiency of all metabolic machinery in capturing, transporting and using oxygen in order to produce muscular work [1,2]. Birth Weight (BW) is considered as an indicator of the health status of newborns because it reflects the intrauterine conditions to AEROBIC CAPACITY, BIRTH AND CHILDHOOD 469 which the fetus was submitted in the gestational period, representing its intrauterine growth and development [5]. Birth Weight is related to anthropometric measurements during childhood, being directly associated with weight, height [6] and lean mass [8]. Their relationship with physical abilities is still uncertain. Controversial findings have been reported for aerobic capacity in which studies indicate no association between Birth Weight and aerobic capacity [9,11] nor reduction of aerobic capacity when adjusting Birth Weight according to sex and age [12]. Other studies have reported both negative [8,13] and positive [6] associations between Birth Weight and aerobic capacity
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