- / genetic factors: they have an undeniable role but are not solely responsible
A small number of genes have a significant impact on body size and the percentage or the regional distribution of body fat.
Overweight children aged one to ten years with at least one obese parent have a 80% risk of becoming obese in adulthood cons 10% chance if both parents are lean.
- / endocrinological factors: hormonal imbalance, glandular
- / other medical factors
- / environmental factors and behavioral changes
Western populations tend to consume fewer calories and less fat than in 1960 when they grow steadily. This reflects a change of lifestyle that is becoming increasingly sedentary.
- Lack of physical activity: there is a real imbalance between supply and swallowed it spent.
