Background: Core body temperature increases in hot climates due to exercise workload, disrupting heat gain and loss of balance. The human thermoregulatory system regulates core body temperature through factors such as metabolic heat production, air temperature, humidity, and clothing. The study investigates physiological thermoregulatory responses in semiprofessional athletes during walking and jogging in different climatic conditions. Methods: A factorial experimental interventional design was used to evaluate different physical activity (low (L)=5 km/h and high (H)=8 km/h) and climatic conditions within the Thermal Environment Laboratory at Lund University, Sweden. The temperature within the climatic chamber was set at 40°C and 31°C, with a relative humidity of 20% and 70%, (hot dry (HD) and hot humid (HW), respectively, to account for a 28°C WBGT. The study used independent T-tests, ANOVA and simple linear regression models to analyse the physiological responses of semiprofessional athletes under different test conditions, comparing gender differences.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
6
Air Temperature (ºC) 30.6±1.2 Relative Humidity (%) 68.6±1.3 Vapour Pressure (kPa) 1011±1.1 Bruel and Kjear (WBGT ºC) 27.3±0.8 Heat Stress (WBGT ºC) 27.8±0.8 Air Velocity (m/s) 0.45±0.19
Relative Humidity (%) 39.7±0.3 Vapor Pressure (kPa) 29.0±1.2 Bruel and Kjear (WBGT ºC) 1007.9± 6.4 Heat Stress (WBGT ºC) 28.9±0.6 Air Velocity (m/s) 28.4±0.3
Relative Humidity (%) 31.1±0.1 Vapor Pressure (kPa )67.1±1.0 Bruel and Kjear (WBGT ºC)1005.7±8.0 Heat Stress (WBGT ºC) 27.4±0.6 Air Velocity (m/s) 27.9±0.3
Relative Humidity (%) 39.8±0.1 Vapor Pressure (kPa) 26.4±0.4 Bruel and Kjear (WBGT ºC) 1004.7±10.7 Heat Stress (WBGT ºC) 28.3±0.3 Air Velocity (m/s) 27.7±0.1
Faculty of Health Sciences, University of Valladolid Soria Campus, Soria, Soria 42004
Soria, Soria, Spain
Exposure Time
duration an athlete is exposed to a specific intensity or environmental condition
Time frame: Just one day, the day of the test, in those weather conditions
Heart Rate
measures how hard your heart works to gauge fitness
Time frame: Just one day, the day of the test, in those weather conditions
Oxygen Uptake
how much oxygen your body uses during activity
Time frame: Just one day, the day of the test, in those weather conditions
Core Body Temperature
the body's internal temperature regulation
Time frame: Just one day, the day of the test, in those weather conditions
Skin Temperature
The temperature of your body's surface
Time frame: Just one day, the day of the test, in those weather conditions
Body Temperature
the internal heat level of the human body
Time frame: Just one day, the day of the test, in those weather conditions
Sweat Rate
the amount of fluid your body loses through sweat per hour during exercise
Time frame: Just one day, the day of the test, in those weather conditions
Perceived Exertion Level
is a subjective scale that measures how hard your body feels it's working during exercise
Time frame: Just one day, the day of the test, in those weather conditions
Thermal Sensation Level
The Thermal Sensation Level is a standardized, subjective rating system used to quantify a person's perception of warmth or coolness in their environment
Time frame: Just one day, the day of the test, in those weather conditions
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