Clinical trial · Interventional
The Impact of Self-assessment on Hydration
The Impact of Self-assessment on Wildland Firefighter and Surrogate Population Hydration
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
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.
Conditions
Conditions (1)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Hydration Status | — | UNRESOLVED | — |
Interventions
Interventions (1)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Hydration education and self-assessment | Behavioral | — | UNRESOLVED |
Design
Arms and outcomes
Arms (2)
- type
- EXPERIMENTAL
- label
- Hydration education and hydration self-assessment
- description
- 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.
- interventionNames
- Behavioral: Hydration education and self-assessment
- type
- NO_INTERVENTION
- label
- No Hydration education and hydration self-assessment (business as usual)
- description
- Participants do not participate in any education or self-assessment, other than applying their normal hydration strategies.
Primary outcomes (2)
- measure
- Fluid turnover
- timeFrame
- Over a period of 4 days, in two 48-hour segments.
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
- Maximum age
- 65 Years
Show eligibility criteria text
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 exclusion criteria 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.
References
Publications (1)
- BACKGROUNDWardenaar FC, Thompsett D, Vento KA, Bacalzo D. A lavatory urine color (LUC) chart method can identify hypohydration in a physically active population. Eur J Nutr. 2021 Aug;60(5):2795-2805. doi: 10.1007/s00394-020-02460-5. Epub 2021 Jan 8. PMID 33416980