The aim is to study per and post-exertion variations of biological markers during an ultra-endurance race

25 healthy adult volunteers participating in the "100 miles South of France 2017©" race recruited electronically by an announcement on the race website

Inclusion Criteria:

1. Age greater 18 years.
2. Subject having already completed an ultra-endurance race (distance greater than 50 kilometers) during the 24 months preceding the race.
3. Affiliation of a social security.

Exclusion Criteria:

1. Age lower than 18 years
2. Subjects with a medical history (pulmonary pathology, cardiac, hypertension) or having a significant chronic inflammatory disease known at the time of the inclusion visit the day before the race.
3. Female

25 healthy adult volunteers participating in the "100 miles South of France 2017 ©" race recruited electronically by an announcement on the race website