Dehydration, Mood
Conditions
Brief summary
Dehydration is defined as the state of water deficit due to excessive water losses and/or small water intake. Underhydration is the result of inadequate water intake leading to activation of water hormonal homeostasis, characterized by elevated vasopressin, lower urinary output, and concentrated urine without any measurable changes in total body water. It is well established that dehydration (water deficit) decreases exercise performance and worsens mood, mainly in women. However, the impact of increased water intake in underhydrated individuals on their exercise capacity and mood is not known. The aim of the proposed study is to investigate the impact of increased water intake in underhydrated individuals on aerobic exercise performance and mood in both women and men.
Interventions
BEHAVIORALIncrease water consumption
The underhydrated individuals will be instructed to increase their water intake for one week in order to meet the following two criteria: a) urinate at least 7 times per day and b) have straw-like color urine. A 2-mile run will be completed before and after the 7-day intervention.
BEHAVIORALMaintain adequate water consumption
The subjects that are classified as euhydrated will be asked to maintain high water intake for one week to ensure proper hydration. A 2-mile run will be completed before and after the 7-day intervention.
Sponsors
Arizona State University
Study design
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 35 Years
Healthy volunteers
Yes
Inclusion criteria
* Healthy adults * Residence in Arizona
Exclusion criteria
* Use of diuretics * Use of anti-depressive medication * Current pregnancy or lactation * Current use of injectable insulin * Diagnosed with irritable bowel syndrome * Do not pass the Physical Activity Readiness Questionnaire for Everyone (PAR-Q) screening
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 2-mile run-time (min) | Day 1 | — |
| Mood | Pre-trial on day 1 | Profile of Mood States questionnaire (POMS 2®-Adult Short, Multi-Health Systems Inc.) |
| Urine osmolality (mmol/kg) | 4 - 8 PM on day 0 | — |
| Urine specific gravity | 4 - 8 PM on day 0 | — |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Urine color | 4 - 8 PM on day 0 | Armstrong validated 8-color scale. Minimum score: 1. Maximum score: 8. A higher score indicates a worse outcome (e.g., dehydrated). |
| Thirst perception | 4 - 8 PM on day 0 | 175 mm visual analog scale. Minimum score: 0 (not thirsty at all). Maximum score: 175 (extremely thirsty). A higher score indicates a worse outcome (e.g., more thirsty). |
Countries
United States
Outcome results
None listed