Water Bolus Volumes During Continuous Exercise in Heat

University at Buffalo (UB)

Status: Completed

Conditions: Hyperthermia; Dehydration (Physiology)

Treatments: Other: Hydration protocol - 500 mL water bolus; Other: Hydration protocol - 237 mL water bolus

Study type: Interventional

Funder types: Other

Identifiers

NCT04613856

STUDY00003387

Details and patient eligibility

About

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.

Enrollment: 16 patients

Sex: Male

Ages: 18 to 39 years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: None (Open label)

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16 participants in 2 patient groups

Current Best Practice - 237 mL water bolus

Active Comparator group

Treatment:

Other: Hydration protocol - 237 mL water bolus

New Intervention - 500 mL water bolus

Experimental group

Treatment:

Other: Hydration protocol - 500 mL water bolus