Study of the Psychological, Physiological and Biomechanical Responses to Trail Running in a Hot, Humid Environment

The determinants of trail performance have been extensively studied, and the results have revealed the significant influence of physiological, psychological and biomechanical parameters. Although there are numerous publications on the physiological responses of thermoregulation to exercise, the impact of heat and humidity on emotional regulation has never been studied in trail running. To the litterature, no study has looked at the evolution of biomechanical parameters during alternating ascents and descents in trail running. No study has compared patterns of motivation between men and women during exercise, even though the hypothesis of a higher level of 'mental fitness' is put forward to explain the very high level of performance of women in long-distance events.

Inclusion Criteria, any runner: * Adult * Participant in trail competitions for at least 2 years. * Affiliated or beneficiary of a social security scheme * Have given their free, informed and written consent * Holding a License from the French Federation of Athletism (FFA) or showing a medical certificate of no contraindication to trail running Exclusion Criteria, any runner: * Do not understand French * Protected (guardianship, curatorship or under family guardianship) or placed under court protection * Whose psychological health may, according to the investigator, affect the participant's compliance * Have difficulty swallowing paracetamol-type capsules and will therefore have difficulty swallowing e-Celsius® Performance capsules.