Search strategy for the MEDILINE database
| Breastfeeding OR feeding OR breast OR ‘breast suckling’ OR suckling OR ‘exclusive breastfeeding’ | AND | ‘cardiorespiratory fitness’ OR fitness OR ‘VO2 max’ OR ‘physical fitness’ OR ‘aerobic capacity’ OR ‘cardio fitness’ | AND | children OR adolescents OR childhood OR Scholars OR School-aged |