Water Bolus Volumes During Continuous Exercise in Heat

Hyperthermia Clinical Trial

Official title:

Water Bolus Volumes During Continuous Exercise in Heat

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04613856
• Other study ID #: STUDY00003387
• Status: Completed
• Phase: N/A
• Start date: April 17, 2019
• Est. completion date: March 12, 2020

Study information

• Verified date: October 2020
• Source: State University of New York at Buffalo
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 16
• Est. completion date: March 12, 2020
• Est. primary completion date: March 12, 2020
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 18 Years to 39 Years

Eligibility

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

Related Conditions & MeSH terms

• Dehydration
• Dehydration (Physiology)
• Fever
• Hyperthermia

Intervention

Other:
• 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.
• 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.

Locations

Country	Name	City	State
United States	Center for Research and Exercise in Special Environments	Buffalo	New York

Sponsors (1)

Lead Sponsor	Collaborator
State University of New York at Buffalo

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Percent body mass loss	Percent body mass loss after water intake	2 hours
Primary	Core temperature	Core temperature after water intake	2 hours