Author + information
- Mohammadreza Vafa1,
- Javad Heshmati1,
- Homa Sadeghi2,
- Farzad Shidfar1,
- Nazli Namazi3,
- Hamidreza Baradaran1 and
- Behzad Heydarpour4
This study was aimed to investigate the relationship between breastfeeding and cardio-respiratory fitness (CRF) on first and second year elementary school students in Kermanshah- Iran, at Imam Ali Hospital, cardiovascular rehabilitation and prevention centers.
In this retrospective cohort study, two hundred and forty six students with the mean SD age of 7.28 ± 0.50 years, mean breast feeding SD duration of 10.26 ± 8.20 months, and body mass index (BMI) of 16.96 ± 3.03 kg/m2 participated. students had no CVD, liver or kidney diseases.Children were categorized in three groups of over 6 months breastfed (>6 months group), less than 6 months breastfed (<6 months group), and formula feeding group. The physician measured CRF calculating VO2 max;and reporting the results as fitness or no fitness.The probable confounders were gender, BMI, fat free mass, fat mass, mother's BMI, dietary poly unsaturated fatty acid (PUFA) and folate, beginning time of supplementary nutrition, physical activity and birth weight.
Breastfeeding more than 6 months was positively associated with CRF (p value<0.001)before and after adjustment for confounders. The risk ratio (RR) of no CRF was 3.22 times more than >6 months group. VO2 max (ml/kg/min) was significantly higher in formula feeding group.
Breastfeeding more than 6 months has positive effects on body composition, fat mass and CRF, and the early nutrition may be an important predictor for adolescence physical and general health.