Effects of Microgravity on Central Aortic Pressure During Parabolic Flights

Inclusion Criteria: * Healthy volunteers (men or women) * Aged from 18 to 65 * Affiliated to a Social Security system and, for non-French resident, holding a European Health Insurance Card (EHIC) * Who accepted to take part in the study * Who have given their written stated consent * Who has passed a medical examination similar to a standard aviation medical examination for private pilot aptitude (JAR FCL3 Class 2 medical examination). There will be no additional test performed for subject selection. Subjects will be staff member of the team or of other teams participating in the parabolic flight campaign. Exclusion Criteria: * Person who took part in a previous biomedical research protocol, of which exclusion period is not terminated * Treated or non-treated arterial hypertension * History of cardiovascular disease * Pregnant women