The oral cavity is an easily accessible anatomical site that accurately reflects the health of the individual. The mouth is considered an early indicator of biological aging, leading to the identification of oral biomarkers predictive of future alterations. Current data show that the oral health of high level athletes is globally altered with an increase in cariogenic indexes, an increased incidence of periodontitis, dental trauma and dry mouth syndromes. Few studies have focused on the oral microbiota compared to mouthguards used in rugby or boxing which seem to induce dysbiosis, a recent study shows an effect of ketogenic diet on bacterial changes in the mouth of endurance athletes. This project focuses on the impact of intensive sport practice on oral health and the identification of oral biomarkers associated with physical activity. The objective of this study is to investigate the impact of the amount of endurance sport practice on oral microbiota and oral health in young adults. the hypothesis is that a sedentary lifestyle and high-level sport induce depletion and/or changes in the oral microbiota compared to regular physical activity.

Inclusion Criteria:

• Be between 18 and 30 years old
• If practicing sports, it must be an endurance sport as main activity (cycling or running)

Exclusion Criteria:

• Practice more than 3 hours of swimming per week
• Have taken anti-inflammatory drugs, less than 48 hours before the study
• Have taken antibiotics and/or probiotics, less than 3 weeks before the study