This project aims to elucidate the complexities of the preventive approach among young people involved in intensive sports activities, providing valuable recommendations to optimize their physical, mental, and social health both in the present and in the long term. The multidisciplinary skills of a team of researchers in sports science and health will contribute their recognized disciplinary expertise through international publications, as well as solid experience in the demands of elite sports, along with a commitment to transferring innovative knowledge toward a preventive approach to sports training.

The main objective is to determine whether a somatotype aligned with the discipline's expectations protects the athlete in terms of self-perception and, consequently, reduces health-risk behaviors. Secondary objectives will include linking somatotype, growth, psychological changes (self-perception), and the emergence of health-risk behaviors or injuries in these young athletes.

Inclusion Criteria:

• Children aged 8 to 15 years old
• Intensive athletes: that is to say they practice a competitive sporting activity with a number of hours of weekly training greater than their age in years.(For example, a 10 year old child will need to train more than 10 hours per week to be included.)
• Sport at an early age
• Obtaining written and signed informed consent from one of the two parents or the holder of parental authority
• Affiliation to a social security system

Exclusion Criteria: menstruation for more than a year at the time of inclusion

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