Water Bolus Volumes During Continuous Exercise in Heat

NCT ID: NCT04613856

Last Updated: 2020-11-03

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

16 participants

Study Classification

INTERVENTIONAL

Study Start Date

2019-04-17

Study Completion Date

2020-03-12

Brief Summary

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Hydration is important to all individuals including occupational workers who complete physical activity in the heat. Current best practice guidelines suggest drinking a cup of water every 15-20 minutes during activity in a hot environment, but research shows this may not be ideal for best maintaining hydration. The goal of this study is to determine if larger, more frequent water boluses better maintain hydration than smaller, less frequent water boluses during moderate intensity physical activity in the heat.

Detailed Description

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Conditions

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Dehydration (Physiology) Hyperthermia

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Randomized, counterbalanced, crossover study
Primary Study Purpose

PREVENTION

Blinding Strategy

NONE

Study Groups

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Current Best Practice - 237 mL water bolus

Group Type ACTIVE_COMPARATOR

Hydration protocol - 237 mL water bolus

Intervention Type OTHER

Subjects consume 237 mL of water every 20 minutes during 2 hours of high intensity work in the heat.

New Intervention - 500 mL water bolus

Group Type EXPERIMENTAL

Hydration protocol - 500 mL water bolus

Intervention Type OTHER

Subjects consume 500 mL of water every 40 minutes during 2 hours of high intensity work in the heat.

Interventions

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Hydration protocol - 237 mL water bolus

Subjects consume 237 mL of water every 20 minutes during 2 hours of high intensity work in the heat.

Intervention Type OTHER

Hydration protocol - 500 mL water bolus

Subjects consume 500 mL of water every 40 minutes during 2 hours of high intensity work in the heat.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Male
* 18-39 y old
* Self-reported to be healthy

Exclusion Criteria

* Female
* Not within defined age range
* History of any cardiovascular, neurologic, or metabolic disease
* Current tobacco use or regular use within the last 2 years.
* Taking medications with known thermoregulatory or cardiovascular effects (e.g., aspirin, beta blockers, diuretics, psychotropics, etc.)
* Inability to follow the rules of the protocols or understand the consent form
Minimum Eligible Age

18 Years

Maximum Eligible Age

39 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

Yes

Sponsors

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State University of New York at Buffalo

OTHER

Sponsor Role lead

Responsible Party

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Riana Pryor

Principal Investigator

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Center for Research and Exercise in Special Environments

Buffalo, New York, United States

Site Status

Countries

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United States

Other Identifiers

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STUDY00003387

Identifier Type: -

Identifier Source: org_study_id