Race Walkers' breathing under the microscope: altitude study reveals hidden lung strain
NCT ID NCT07466849
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at whether training at high altitudes causes or worsens exercise-induced bronchoconstriction (EIB) in 64 elite race walkers. Participants completed lung function tests, treadmill challenges, and blood draws at both low and high altitudes over 2-4 months. The goal was to diagnose EIB and see how it affects athletic performance, helping coaches tailor training and treatment.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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64 people
The number who actually took part.
- Started
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Jul 2025
- Finished
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Oct 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
This study aims to enroll active race walking athletes with a minimum technical grade of National First-Class (≥ Tier 3). The target population represents well-trained endurance athletes currently preparing for or competing in national-level events. Participants are expected to be free from injury and in a consistent training macrocycle to ensure the validity of the physiological assessments.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: Only athletes who meet the following conditions simultaneously can be included in this study: * Engaged in race walking specialized training; * The athlete's technical grade reaches the national first-class standard or above (the athlete's level level is ≥ Tier 3); * Regular professional training is still maintained at present. Exclusion Criteria: * Presence of chronic cardiopulmonary diseases (e.g., chronic obstructive pulmonary disease, pulmonary heart disease, known structural heart disease) or other significant medical conditions (e.g., uncontrolled hypertension, depression) that could confound respiratory test results or pose a risk during intense exercise; * Known hypersensitivity to hypoxia or history of severe altitude sickness (e.g., high-altitude pulmonary edema \[HAPE\], high-altitude cerebral edema \[HACE\]); * Sickle cell trait or disease; * History of chest surgery within the preceding 6 months; * Any active lung infection (e.g., pneumonia, bronchitis) or systemic infection within 3 weeks before the examination; * Cessation of regular training for 2 or more weeks immediately before the examination, to ensure participants were in their typical training state; * Experience of a moderate or severe upper respiratory tract infection (e.g., common cold) within the week preceding the examination; * Individuals who reported chest pain or experienced syncope (fainting) during the spirometry maneuver; * Individuals who were unable to understand the test instructions or unwilling to cooperate fully with the testing procedures, as determined by the research staff.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Chongqing Institute of Sports Science
Chongqing, China