Non-invasive Prediction of Thermal Strain in Healthy Male Adults (HUMONHEAT)

Simon Annaheim

Status: Completed

Conditions: Heat Stress

Treatments: Other: Heat strain

Study type: Interventional

Funder types: Other

Identifiers

NCT04650776

5213.00095

Details and patient eligibility

About

This is primarily an experimental study investigating methods of temperature measurement / heat strain detection. In the calibration study, there are different skin temperature sensor types, and in the prediction study there are different methods for determining heat strain, including conventional methods (rectal, gastro-intestinal), the development of a prediction model, and an index based on heart rate variability.

Enrollment: 13 patients

Sex: Male

Ages: 18 to 45 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Apparently healthy males
• aged 18-45 y
• regularly participate in sport, exercise, or equivalent physical activity on a weekly basis.

Exclusion criteria

• Known injuries or illnesses that may affect safe participation. These include injuries or illnesses involving (but not limited to):
• cardiovascular, renal, or gastrointestinal tract
• heat or exercise intolerance
• acute infections,
• immunological diseases (including asthma)
• psychiatric disorders.
• Participants must not be currently or previously on cardiovascular-related medication and must not be taking psychotropic medication (last 60 days).

Trial design

Primary purpose: Screening

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: None (Open label)

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13 participants in 2 patient groups

High heat strain

Experimental group

Description:

participants exercised at 75% of their heart rate maximum (HR max) and wore light athletic clothing (t-shirt and shorts)

Treatment:

Other: Heat strain

Low heat strain

Experimental group

Description:

participants exercised at 50% HR max, wearing protective firefighter clothing (jacket and trousers)

Treatment:

Other: Heat strain