THERMO25: Thermoregulation During a 25-km Open Water Race
Study Details
Study Description
Brief Summary
Open water swimming is a swimming discipline which takes place in outdoor water such as open oceans, lakes, and rivers. Elite swimmers are exposed to hypothermia when swimming in cold water, especially in long duration races, such as the 25-km race. The objective of this study is to evaluate the change in body core temperature in swimmers with continuous temperature monitoring during a 25-km race. The secondary objective is to identify the predictors of hypothermia and hypothermia-related drop-out.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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Study Design
Outcome Measures
Primary Outcome Measures
- Change in Body Core Temperature [Continuous measurement was collected from 30 minutes before the race until 2 hours after the end of the race for each swimmer]
Measurement of Body Core Temperature using an ingestible electronic sensor (e-Celsius®, BodyCap , Caen, France) which provide a continuous validated measurement
- Change in Water Temperature [Continuous measurement was collected from 30 minutes before the race until 2 hours after the end of the race for each swimmer]
Measurement of the Water Temperature using an electronic sensor (iButton® Maxim Integrated) which provide a continuous validated measurement
Secondary Outcome Measures
- Body composition, body mass [One measurement assessed the day before the race]
Body mass (in kg) was measured using bioelectrical impedance analysis (mBCA 525, Seca, Germany).
- Body composition, fat mass [One measurement assessed the day before the race]
Fat mass (in kg, % of body mass [fat mass and body mass were combined to report % of body mass) was measured using bioelectrical impedance analysis (mBCA 525, Seca, Germany).
- Body composition, fat-free mass [One measurement assessed the day before the race]
Fat-free mass (in kg, % of body mass [fat-free mass and body mass were combined to report % of body mass) was measured using bioelectrical impedance analysis (mBCA 525, Seca, Germany).
- Body composition, muscle mass [One measurement assessed the day before the race]
Muscle mass (in kg, % of body mass [muscle mass and body mass were combined to report % of body mass) was measured using bioelectrical impedance analysis (mBCA 525, Seca, Germany).
- Perception of Cold [One measurement assessed immediately at the end of the race]
Immediately at the end of the race participants' perception of cold was assessed using the Cold Discomfort Scale (CDS, with rating from 0-to-10 over 10, where 0 indicates no experience of cold and 10 indicates unbearable cold)
- Performance [Time at each lap of 2500m and at the end of the race]
Time at each lap and swimming race timing was collected using the official swimming timing from the race organisers and French Federation
- Dropout rate [During the swimming race and data were collected immediately after dropout for each swimmer who dropped out]
Swimmers who dropout were identified and cause for dropout was collected
Eligibility Criteria
Criteria
Inclusion Criteria:
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competitors of the 25-km French Open Water Championship
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participants who volunteered for this study
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written consent was obtained from all participants, as well as their legal representatives when applicable (i.e. parents for under age participants).
Exclusion Criteria:
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swallowing disorders
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transit disorders
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MRI scheduled within 48 hours
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | CHU Caen Normandie | Caen | France | 14000 |
Sponsors and Collaborators
- University Hospital, Caen
Investigators
- Principal Investigator: Joffrey Drigny, MD MSC, CHU Caen Normandie
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- THERMO25