The UV index in Mayotte and Reunion is greater than 14, eight months out of 12. This index decreases linearly over the period from mid-April to mid-August where it can drop to reach an index of 8 in the month of July. The inhabitants are therefore exposed to a maximum intensity of UV radiation according to the WHO.

The World Health Organization (WHO) recommends extreme precautions for indices greater than 11 (avoid exposure between 11 a.m. and 3 p.m. (GMT+3 hours), stay in the shade, wear a t-shirt, sunglasses, hat and sunscreen).

Sun exposure is a major risk factor in the development of skin cancer, basal cell cancer, squamous cell cancer and cutaneous melanoma. It is also the cause of premature aging of the skin. Moreover, it causes ocular complications such as the occurrence of cataracts and this without distinction of skin phenotype.

There is currently no prevention campaign on the risks of sun exposure in Mayotte or Reunion for adults, while many risky behaviors are observed both in the professional field and during leisure activities. In order to better understand risk-taking and choose appropriate awareness-raising tools, it is necessary to identify the knowledge, attitudes and practices (KAP) of these populations in terms of risk of sun exposure and to measure the impact of solar prevention education actions.

Inclusion Criteria:

• Live in Mayotte or Reunion island
• 18 years old,
• Practice outdoor sports > 4 hours per week in one of the identified sports associations
• Belong to the list of targeted associations

Exclusion Criteria:

• Person deprived of liberty by judicial or administrative decision, minor, and person subject to a legal protection measure: guardianship or curators
• Person not wishing to participate
• No one speaking any of the following languages: English / French / Shimaore / Kibushi / Creole or Comorian
• Person who cannot be followed during the 6 months of the study
• Inability to answer the questionnaire