Recommended dairy intake is associated with healthy dietary habits, better physical fitness, less obesity and a healthier lifestyle profile in school age children.

ABSTRACT

This study aimed to identify the association of recommended dairy intake with several dietary habits, obesity, physical fitness (PF), physical activity (PA), screen time and sleep. Population data were derived from a health survey on a representative sample of 177 091 children aged 8-17 years. Dairy intake and dietary habits were evaluated using questionnaires (KIDMED index). Participants were characterised as 'dairy products consumers' based on whether they met current recommendations for milk or dairy consumption (e.g. if they consumed two yogurts and/or 40 g cheese and a cup of milk daily). Participants who did not consume the above-mentioned quantities were characterised as 'non-consumers.' Anthropometric and PF data were obtained by trained investigators. PA status, screen time and sleeping habits were assessed through self-completed questionnaires. Boys and girls consuming recommended dairy products were 25 % (95 % CI 0·71, 0·79) and 43 % (95 % CI 0·51, 0·64) less likely to have low performances in cardiorespiratory fitness tests, Participants from both sexes classified as dairy products consumers had lower odds of central obesity by 10 % (95 % CI 0·86, 0·95), as compared with non-consumers. Moreover, recommended dairy products consumers had lower odds for insufficient sleep by 8 % (95 % CI 0·89, 0·96) in boys and 14 % (95 % CI 0·83-0·90) in girls, for inadequate PA levels by 15 % (95 % CI 0·77, 0·93) in boys and 16 % (95 % CI 0·76, 0·90) in girls and for increased screen time by 11 % (95 % CI 0·83, 0·95) in boys and 9 % (95 % CI 0·85, 0·97) in girls than no-consumers. In conclusion, recommended dairy intake is associated with less obesity, better PF and a healthier lifestyle profile.