Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
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.
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Euhydrated | Active Comparator | Afternoon urine osmolality < 800 mmol/kg or urine specific gravity < 1.020. |
|
| Underhydrated | Experimental | Afternoon urine osmolality ≥ 800 mmol/kg or urine specific gravity ≥ 1.020. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Increase water consumption | Behavioral | 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. |
| Measure | Description | Time Frame |
|---|---|---|
| 2-mile run-time (min) | Day 1 | |
| 2-mile run-time (min) | Day 8 | |
| Mood | Profile of Mood States questionnaire (POMS 2®-Adult Short, Multi-Health Systems Inc.) | Pre-trial on day 1 |
| Mood | Profile of Mood States questionnaire (POMS 2®-Adult Short, Multi-Health Systems Inc.) | Post-trial on day 1 |
| Mood | Profile of Mood States questionnaire (POMS 2®-Adult Short, Multi-Health Systems Inc.) | Pre-trial on day 8 |
| Mood | Profile of Mood States questionnaire (POMS 2®-Adult Short, Multi-Health Systems Inc.) | Post-trial on day 8 |
| Urine osmolality (mmol/kg) | 4 - 8 PM on day 0 | |
| Urine osmolality (mmol/kg) | 4 - 8 PM on day 7 | |
| Urine osmolality (mmol/kg) | Upon waking (first morning sample) on day 1 | |
| Urine osmolality (mmol/kg) |
| Measure | Description | Time Frame |
|---|---|---|
| Urine color | Armstrong validated 8-color scale. Minimum score: 1. Maximum score: 8. A higher score indicates a worse outcome (e.g., dehydrated). | 4 - 8 PM on day 0 |
| Urine color | Armstrong validated 8-color scale. Minimum score: 1. Maximum score: 8. A higher score indicates a worse outcome (e.g., dehydrated). |
Not provided
Inclusion Criteria:
Exclusion Criteria:
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Interdisciplinary Science and Technology Building 8 | Phoenix | Arizona | 85004 | United States |
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
| ID | Term |
|---|---|
| D003681 | Dehydration |
| ID | Term |
|---|---|
| D014883 | Water-Electrolyte Imbalance |
| D008659 | Metabolic Diseases |
| D009750 | Nutritional and Metabolic Diseases |
| D010335 | Pathologic Processes |
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
|
| Maintain adequate water consumption | Behavioral | 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. |
|
| Upon waking (first morning sample) on day 8 |
| Urine specific gravity | 4 - 8 PM on day 0 |
| Urine specific gravity | 4 - 8 PM on day 7 |
| Urine specific gravity | Upon waking (first morning sample) on day 1 |
| Urine specific gravity | Upon waking (first morning sample) on day 8 |
| 4 - 8 PM on day 7 |
| Urine color | Armstrong validated 8-color scale. Minimum score: 1. Maximum score: 8. A higher score indicates a worse outcome (e.g., dehydrated). | Upon waking (first morning sample) on day 1 |
| Urine color | Armstrong validated 8-color scale. Minimum score: 1. Maximum score: 8. A higher score indicates a worse outcome (e.g., dehydrated). | Upon waking (first morning sample) on day 8 |
| Thirst perception | 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). | 4 - 8 PM on day 0 |
| Thirst perception | 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). | 4 - 8 PM on day 7 |
| Thirst perception | 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). | Upon waking (first morning sample) on day 1 |
| Thirst perception | 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). | Upon waking (first morning sample) on day 8 |
| D013568 | Pathological Conditions, Signs and Symptoms |