The Impact of Self-assessment on Wildland Firefighter and Surrogate Population Hydration
试验速览
- 阶段
- 不适用
- 状态
- Enrolling By Invitation
- 入组人数
- 38
- 试验地点
- 1
- 主要终点
- Fluid turnover
研究概览
简要总结
The studies objective is to assess the efficacy of hydration education and the use of a self-assessment worksheet vs. a no-intervention control on improving fluid intake and hydration status in underhydrated wildland firefighters (WLFFs) and their surrogates.
Part I allows to understand hydration status of the participants (screening phase), Part II confirms if participants indeed are deemed to be low fluid consumers, and Part III of this research is a clinical trial that will focus on the optimization of hydration by improving fluid intake (and as a result lowering urine concentration) allowing participants theoretically to improve exercise performance (acute) and optimize health on the long term.
详细描述
Enrollment will take place until enough people have been screened and be eligible to be enrolled in PART III of the study.
Aside from allowing the investigators to better understand the hydration status of participants in PART I, this part will help to determine potentially eligible participants that can be confirmed through PART II by collecting again a urine sample, and if again concentrated urine is confirmed the research team will take a 5 mL venous blood draw performed by a trained phlebotomist to confirm elevated a copeptin level. These confirmed participants can then be enrolled in PART III of the study when eligible.
PART I includes all participants:
Two urine samples and questionnaire at one day. Expected duration of 2-3 minutes per urine sample and 2-3 minutes for the participant demographics questionnaire which will also be used as a screener to identify eligibility for PART II and III.
PART II includes a smaller sample:
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- None
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
- 是
入选标准
- •The study plans to include firefighters from the Tonto National Forest and the broader Phoenix Valley area, and if needed, other active populations that are similarly active to WLFFs. Participants with high urine concentration (≥1.020 USG) for both samples collected during Part I (screening phase), may be invited to provide an additional urine sample and a blood sample for copeptin analysis during a follow up day (Part II). Participants with elevated USG and copeptin are eligible to participate in the study.
- •Inclusion for PART I is that participants are part of a by the research selected wildland firefighter population (or surrogate population), no further
排除标准
- •are followed for PART I. For Part II and Part III the following criteria apply:
- •Inclusion Criteria:
- •Age 18-65 years
- •Identifying as male, female or other
- •Exclusion Criteria:
- •Thyroid medication
- •Bariatric surgery
- •Cardiovascular disease
- •Renal disease
- •Hepatic disease
- •Bodyweight <110 lbs.
- •Any injury that would not allow physical performance or activity
- •Pregnant or lactating
- •Diuretics
- •Non-stable self-reported body weight for the last month (<10 lbs. fluctuation)
- •Investigators will not exclude participants reporting the use of dietary supplements as there is no evidence that the accuracy of self-assessment (specifically the accuracy of urine color assessment) to determine a low vs. high urine concentration is influenced by dietary supplement use, but participants will be questioned about their supplement, electrolyte and sport drink use.
研究组 & 干预措施
No Hydration education and hydration self-assessment (business as usual)
Participants do not participate in any education or self-assessment, other than applying their normal hydration strategies.
Hydration education and hydration self-assessment
Participants will participate in a 25-minute hydration education session that also includes instruction about how the use the hydration self-assessment worksheets and materials.
干预措施: Hydration education and self-assessment (Behavioral)
结局指标
主要结局
Fluid turnover
时间窗: Over a period of 4 days, in two 48-hour segments.
Fluid turnover based on D2O analysis
Urine concentration
时间窗: Afternoon sample day 1, morning sample day 2/4/6
Urine concentration (osmolality).
次要结局
- Urine concentration(Afternoon sample day 1, morning (and potential afternoon) samples day 1/2/3/4/5/6.)
- Activity(Throughout the study during working hours, which may vary between 8-16 hours per working day.)
- Hydration strategy(Day 6 of the data collection, covering the hydration strategy during the study period.)
- Heat stress(Throughout the study during working hours, which may vary between 8-16 hours per working day.)
- INT: Self-reported hydration measures(Study days 2/3/4/5/6.)
研究者
Floris Wardenaar
Assistant Professor in Nutrition
Arizona State University