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Completed

NCT Number: NCT03712592

Physiological Constraints Associated With Trail Running

The practice of mountain running or "trail" is in full development in France and elsewhere in the world. This sporting practice associates specific physiological constraints related in particular to the duration of the efforts made (several hours) and to the ground (important elevation, technical ground, average altitude). Some studies have allowed the last 10 years to initiate the exploration of the physiological consequences of this type of practice, especially from a muscular point of view. However, some important questions remain to be clarified such as the impact of these sports events on fatigue and muscle recovery, cardiovascular, energy and water balance disturbances caused, induced sleep changes and the kinetics of recovery of the various parameters. . These elements remain in particular to be studied in very different racing contexts as currently developed by the organizers, namely race in one stage from long to very long distances (40 to 160 km) and race in stages (4 days, 4 x 40 km) as encountered in the Grenoble UT4M race (Ultra Tour des 4 Massifs).

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Key information

Conditions

Muscle Fatigue

Age range

18 year–55 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

CHU Grenoble-Alpes

Grenoble, 38043, France

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • Man or woman
  • 18-55 years
  • Absence of chronic cardiovascular, respiratory, metabolic or neuromuscular disease
  • > 3 years of trail running (at least 1 race> 40 km / year completed and a race> 100 km completed (trail group 160 km)
  • Medical certificate of no contraindication to the practice of the trail
  • Subjects available in Grenoble before and within 15 days after the race
  • Subjects affiliated to a social security scheme
  • Subjects able to sign informed consent.

Exclusion criteria

  • Cardiorespiratory, metabolic and neurological diseases
  • Non-Echogenic Subjects
  • Subjects with chronic sleep disorders
  • Psychiatric pathologies or ATCD of behavioral disorders
  • Persons refusing to sign the information sheet and the participation agreement,
  • persons under guardianship or not subject to a social security scheme,
  • Pregnant woman, parturient, breastfeeding mother
  • Person deprived of liberty by judicial or administrative decision,
  • Person subject to a legal protection measure, who can not be included in clinical trials.

Treatment and study plan

Pre and post running evaluations

Other

Each visit will include a series of neuromuscular, cardiovascular, blood glucose and body composition evaluations will be performed. The subjects will provide some information about their muscular pain and their food and water intake.

Finally, for the study of sleep that only concerns participants in the 4x40 km race, a home sleep registration banner will be given to each participant of the event step by step at the arrival of each stage in order to study sleep the next night as well as 2 nights after the arrival of the last stage.

Primary outcomes

  1. Quantification of the level of ankle extensors fatigue induced by trail

    Time frame: one month and 12 days

    Pre-post-force decrease in muscle contractility of ankle extensors assessed by neurostimulation

  2. Quantification of the level of knee extensors fatigue induced by trail

    Time frame: one month and 12 days

    Pre-post-force decrease in muscle contractility of knee extensors assessed by neurostimulation

  3. Quantification of the level of ankle extensors fatigue induced by trail

    Time frame: one month and 12 days

    Pre-post-force decrease in muscle contractility of infarction assessed by echocardiography

Sponsors and collaborators

Lead sponsor

University Hospital, Grenoble

Other

Collaborators

  • University Grenoble Alps

Registry information

Acronym: UT4M2018

Important dates

Study start
2018
Primary completion
2018
Study completion
2018
First posted
Oct 19, 2018
Registry last updated
Dec 29, 2025

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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