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Completed

NCT Number: NCT07831109

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.

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Key information

Conditions

Running Motivation for Physical Activity Sport Physiology

Age range

18 month and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

CHU Réunion

Saint-Denis, France, 97400, Reunion

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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.

Treatment and study plan

Trail running of 28km and 2580m vertical drop

Other

Running 5 round trip, up and down a hill of 2.8km each and 516m vertical drop

Primary outcomes

  1. Effort measurements

    Time frame: 11 measurements, before the start and after each ascent and each descent, between 30 minutes and 1hour and 30 minutes

    Level of effort will be measured using a scale (Borg, 1990) from 0 to 10 (0 meaning no effort, and 10 maximal effort).

  2. Pleasure measurements

    Time frame: 11 measurements, before the start and after each ascent and each descent, between 30 minutes and 1hour and 30 minutes

    Level of pleasure will be measured using a scale (Baron et al, 2011), from 0 to 10 (0 meaning no pleasure, and 10 maximal pleasure).

  3. Sensation measurements

    Time frame: 11 measurements, before the start and after each ascent and each descent, between 30 minutes and 1hour and 30 minutes

    Levels of sensation will be measured using a scale (Hardy & Rejeski, 1989) from -5 to +5 (-5 feeling very bad; to +5 feeling very good)

  4. Fatigue measurements

    Time frame: 11 measurements, before the start and after each ascent and each descent, between 30 minutes and 1hour and 30minutes

    Levels of fatigue will be measured using a scale (Brownstein et al, 2021) from 0 to 10 (0 not tired at all; to 10 total exhaustion)

  5. Motivation measurements

    Time frame: 11 measurements, before the start and after each ascent and each descent, between 30 minutes and 1hour and 30 minutes

    Levels of motivation (5 questions) will be measured using a scale MMSE (Baron et al, 2022) from 0 to 7 (0 not motivation to 7 very motivated)

  6. Body temperature measurements

    Time frame: 11 measurements, before the start and after each ascent and each descent; between 30 minutes and 1hour and 30minutes

    • Body temperature measurement in Celsius degree (Caméra FLIR E8xt, Wilsonville, Oregon, USA)

  7. Changes in body weight

    Time frame: 11 measurements, before the start and after each ascent and each descent; between 30 minutes and 1hour and 30 minutes

    Changes in body weight measured in kilograms

  8. Osmolarity measurements

    Time frame: 11 measurements, before the start and after each ascent and each descent; between 30 minutes and 1hour and 30 minutes

    Salivary osmolarity will be measured using an MX3 Hydration Testing System® in nOsm

  9. Drop jumps measurements

    Time frame: 11 measurements, before the start and after each ascent and each descent; between 30 minutes and 1hour and 30minutes

    Seven drop jumps

  10. Cardiac frequency measurements

    Time frame: All the way from the start till the end of the race, measurement made automatically every 30 seconds

    Cardiac frequency measured by heart rate monitor Performance

  11. Central body temperature measurements

    Time frame: All the way from the start till the end of the race, measurement made automatically every 30 seconds

    Central body temperature measured by ingested pills e-Celsius® Performance in Celsius degree

  12. volume of water consumed

    Time frame: 11 measurements, before the start and after each ascent and each descent; between 30 minutes and 1hour and 30minutes

    The volume of water consumed during the previous segment will be recorded in liters

Sponsors and collaborators

Lead sponsor

Centre Hospitalier Universitaire de la Réunion

Other

Collaborators

  • Universite de La Reunion
  • University of Franche-Comté

Registry information

Acronym: RP2B-Trail

Important dates

Study start
2024
Primary completion
2024
Study completion
2024
First posted
Sep 21, 2026
Registry last updated
Sep 21, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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