Impact of Prolonged Cold-water Swimming on Heart Rate and Cardiac Function in Healthy Swimmers.
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 20
- 试验地点
- 1
- 主要终点
- Heart rate from a resting ECG recording
研究概览
简要总结
A significant medical risk associated with hypothermia during exercise in a cold environment cardiac arrhythmia due to a possible autonomic conflict. However, little is known about the changes in heart rate and cardiac function after prolonged cold water swimming.
The investigators propose to measure the changes in core temperarure during and after a cold water swim at at a water temperature below 15.5°C qualifying for English Channel swim and to test the association with changes in heart rate variability, resting electrocardiogram and left ventricle function.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •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
排除标准
- •swallowing disorder
- •chronic gastrointestinal disease
- •MRI scheduled within 48 hours after the race.
- •known cardiac arythmia or cardiovascular disease
结局指标
主要结局
Heart rate from a resting ECG recording
时间窗: Two Time points (1) the day before the race and (2) at 30 min after ending the race
Waves, intervals \& segments of the normal ECG trace was collected
Heart rate from a 5-minute ECG recording
时间窗: Two Time points (1) the day before the race and (2) at 30 min after ending the race
Heart rate variability (HRV) parameters including time-domain measures and frequency-time measures
Change in Body Core Temperature
时间窗: Time Frame: 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
Transthoracic echocardiography (TTE) analysis
时间窗: Two Time points (1) the day before the race and (2) at 30 min after ending the race
Left and right ventricular and atrial dimensions, and systolic and diastolic ventricular function assessment were collected
次要结局
- Body composition, fat-free mass(One measurement assessed the day before the race)
- Individual characteristics, gender(One evaluation assessed the day before the race)
- Body composition, body fat mass(One measurement assessed the day before the race)
- Individual characteristics, age(One evaluation assessed the day before the race)
- Duration(The duration of swimming was collected from the organisers immediately after the race)
- Individual characteristics, training in cold environment(One evaluation assessed the day before the race)
研究者
Joffrey DRIGNY
MD MSc, Attending physician in Sport Medicine and PM&R departme
University Hospital, Caen