Core Temperature Afterdrop in Cold-water Swimming
- Conditions
- Cold Water SwimmingHypothermia, Accidental
- Interventions
- Other: Swimming participants in the 6-hour cold water swim
- Registration Number
- NCT05409560
- Lead Sponsor
- University Hospital, Caen
- Brief Summary
A significant risk associated with hypothermia during exercise in a cold environment is the core temperature (T°core) afterdrop, which corresponds to a continuous fall in T°core during rewarming after hypothermia. However, the rate and predictors of the afterdrop are unclear, particularly during prolonged cold water swimming.
The investigators propose to measure the changes in T°core during and after a cold water swim at 12.5-13°C qualifying for English Channel swim and to test the impact of anthropometric and swimming parameters on the duration of the T°core afterdrop. The hypotheses are that afterdrop is common during a prolonged cold water swimming event and that protective factors against T°core drop during cold water swimming (increased body fat and BMI) might, conversely, be associated with prolonged afterdrop.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 15
- swimmers taking part in the Channel Swim Camp
- swimmers above 18 years of age
- swimmers willing and able to give informed consent for participation in the study
- swallowing disorder
- chronic gastrointestinal disease
- MRI scheduled within 48 hours after the race.
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Arm && Interventions
Group Intervention Description Cold water swimmers Swimming participants in the 6-hour cold water swim swimmers participating in the 6-hour cold water swim, qualifying for the English Channel Swim
- Primary Outcome Measures
Name Time Method 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
- Secondary Outcome Measures
Name Time Method 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).
Individual characteristics, training in cold environment One evaluation assessed the day before the race The variable collected was the type of specific training in cold environment (yes/no)
Body composition, body 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).
Distance The distance of swimming was collected from the organisers immediately after the race Distance of the swimming
Individual characteristics, gender One evaluation assessed the day before the race The variable collected was the gender of participants
Individual characteristics, age One evaluation assessed the day before the race The variables collected was the age of participants
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).
Duration The duration of swimming was collected from the organisers immediately after the race Duration of the swimming
Individual characteristics, swimming habits One evaluation assessed the day before the race The variables collected was the swimming distance per week (total, swimming pool and open water)
Trial Locations
- Locations (1)
CHU Caen Normandie
🇫🇷Caen, France