The Effect of 5-site Ice Pack Cooling on Body Temperature, Skin Temperature, and Heart Rate After Exercise-induced Hyperthermia
试验速览
- 阶段
- 不适用
- 状态
- 撤回
- 主要终点
- Change in Esophageal Temperature
研究概览
简要总结
This research study aims to examine whether Cryo Cooling packs reduce thermal and cardiovascular strain after exercise-induced hyperthermia compared to a commercially available ice pack. Secondly, the effect of Cryo Cooling packs on cognitive and exercise performance will be examined. There is no current research examining the efficacy of Cryo Cooling packs in hyperthermic individuals and this information will be helpful to establish whether Cryo Cooling Packs can be used for performance enhancement or to prevent heat illness.
详细描述
This study will consist of three study visits:
Visit 1: Baseline and VO2max Testing Visit 2-3: Trial 1 and 2.
Visit 1: Baseline and VO2max Testing
Participants who are approved to participate will be scheduled for a baseline and VO2max testing day. Upon arrival to the lab, subjects will provide a urine sample in a clean urine cup. Urine specific gravity and urine color will be assessed. Nude body mass will be also be recorded. Privacy will be afforded for each participant while obtaining body mass measures by taking measurements with the participant alone in a private room behind a solid, closed door, and the research reading the scale outside of the room. Participants will only be permitted to continue to the VO2max test if the euhydrated criteria of a urine specific gravity (USG) ≤1.025 is met. If the participant arrives with a USG between 1.020 and 1.025, the subject will be asked to drink 500 mL of water to ensure proper hydration status. Height will be measured with a tape measure on Visit 1. Percent body fat will be calculated using a 3-site evaluation of skin fold thickness using skin fold calipers on one of the three baseline days. A researcher will use appropriate grasping technique to measure skin fold thickness on the chest, abdomen, and thigh. This will take less than ~5 minutes to complete. This information will be used to describe the subject demographics. Participants will also be asked to complete a maximal oxygen uptake (VO2max) test on a treadmill in a thermoneutral environment. This test will provide aerobic fitness levels of the participants.
Visit 2-3: Trials 1 and 2
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Treatment
- 盲法
- Single (Participant)
盲法说明
The participant will be blinded to which ice pack will be used during the intervention.
入排标准
- 年龄范围
- 18 Years 至 30 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Between the ages of 18-30 years
- •been cleared by the medical monitor for this study
排除标准
- •Have a current musculoskeletal injury that would limit their physical activity or preclude the participant from walking, jogging, running, sprinting, or cutting.
- •Chronic health problems that affect your ability to thermoregulate (disorders affecting the liver, kidneys or the ability to sweat normally)
- •Fever or current illness at the time of testing
- •History of cardiovascular, metabolic, or respiratory disease
- •Current musculoskeletal injury that limits their physical activity
- •Currently taking a medication that is known to influence body temperature (amphetamines, antihypertensives, anticholinergics, acetaminophen, diuretics, NSAIDs, aspirin)
- •Are a female
- •Have a history of heat related illness
- •Throat or gastroesophageal diseases including gastroesophageal reflux disease (aka, GERD) or difficulty swallowing
结局指标
主要结局
Change in Esophageal Temperature
时间窗: Measured continuously for 2-3 hours during exercise and cooling period
Esophageal thermometer will be inserted by trained personnel to assess core temperature
Change in Heart rate
时间窗: Measured continuously for 2-3 hours during exercise and cooling period
A heart rate monitor will be worn by participant throughout exercise/cooling protocol
Change in Perception of Thirst
时间窗: Collected every 5 minutes during 2-3 hour exercise and cool down period.
0-9 (no thirst to very,very thirsty) Scale that indicates how thirsty the participant is
Change in Rectal Temperature
时间窗: Measured continuously for 2-3 hours during exercise and cooling period
Rectal thermometer will be self-inserted by participant to assess core temperature
Change in Rating of Perceived Exertion
时间窗: Collected every 5 minutes during 2-3 hour exercise and cool down period.
6-20 scale that indicates how hard the participant feels they are working
Change in Thermal Sensation
时间窗: Collected every 5 minutes during 2-3 hour exercise and cool down period.
0-8 Scale (cold to hot) that indicated how cold or hot the participate feels
Change in Skin Temperature
时间窗: Measured continuously for 2-3 hours during exercise and cooling period
4 skin temperature sensors will be placed on the subject (chest, shoulder, thigh, calf) during exercise and the cooling intervention
Change in Perception of Fatigue
时间窗: Collected every 5 minutes during 2-3 hour exercise and cool down period.
0-10 (no fatigue to extreme fatigue) Scale that indicates how fatigued the participate feels
次要结局
- Profile of Mood States(immediately following cooling intervention)
- Digits Backwards(immediately after cooling intervention)
- Reaction time test(immediately after cooling intervention)
- 1 Mile run(immediately following Cooling)
- Grip strength: Hand Grip Dynamometer(immediately following cooling)
研究者
Douglas J Casa
Professor
University of Connecticut