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Validation of Heat Stress Limit Values for the Athletic Performance (HSL-AP)

Primary Purpose

Physiological Stress, Heat Stress, Sports Injury

Status
Completed
Phase
Not Applicable
Locations
Pakistan
Study Type
Interventional
Intervention
analytical determination and interpretation of heat stress using calculation of the Predicted Heat Strain and Wet Bulb Globe Temperature
Sponsored by
University of the Punjab
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional prevention trial for Physiological Stress focused on measuring Heat Stress, Physiological Responses, WBGT, PHS

Eligibility Criteria

22 Years - 27 Years (Adult)All SexesAccepts Healthy Volunteers

Inclusion Criteria Semiprofessional aged 22-27 years of both genders. Body surface area between 1.5 to 2.5 m2 Semiprofessional participating in regional competition level, receive monetary compensation for their sports participation, participating in sports activity in the last six year, and skill level. Semiprofessional demonstrating a higher level of skill and performance than recreational or amateur participants . Exclusion Criteria Subjects should not have any known heart disease or circulatory disorder. No known respiratory disease or heat allergy. No habitual smoker or drug user.

Sites / Locations

  • Department of Public Health, University of the Punjab

Arms of the Study

Arm 1

Arm 2

Arm 3

Arm 4

Arm Type

Experimental

Experimental

Experimental

Experimental

Arm Label

Test Condition 1

Test Condition 2

Test Condition 3

Test Condition 4

Arm Description

Variable Test Condition 1 WBGT 28 °C Clothing High Visibility Air Temperature 40 °C RH % 20 % Vapor Pressure 2.3 kPa Walking Speed 5 km/h Time 70 min

Variable Test Condition 2 WBGT 28 °C Clothing High Visibility Air Temperature 40 °C RH % 20 % Vapor Pressure 2.3 kPa Walking Speed 8 km/h Time 70 min

Variable Test Condition 3 WBGT 28 °C Clothing High Visibility Air Temperature 31 °C RH % 70 % Vapor Pressure 3.1 kPa Walking Speed 5 km/h Time 70 min

Variable Test Condition 4 WBGT 28 °C Clothing High Visibility Air Temperature 31 °C RH % 70 % Vapor Pressure 3.1 kPa Walking Speed 8 km/h Time 70 min

Outcomes

Primary Outcome Measures

Physiological Response
Rate of change of skin temperature (Tsk) of semi-professional athletes during walking 5km/hr and Jogging 8km/hr for 70 minutes in hot wet (Ta 40 C & 70% RH) and hot dry (Ta 31C & 20% RH) test conditions.
Physiological Response
Rate of change of core body temperature (Tcore) of semi-professional athletes during walking 5km/hr and Jogging 8km/hr for 70 minutes in hot wet (Ta 40 C & 70% RH) and hot dry (Ta 31 C & 20% RH) test conditions.
Physiological Response
Rate of change of Heart Rate (HR bpm) of semi-professional athletes during walking 5km/hr and Jogging 8km/hr for 70 minutes in hot wet (Ta 40 C & 70% RH) and hot dry (Ta 31 C & 20% RH) test conditions.
Physiological Response
Consumption of oxygen (VO2 Max ml/min/kg) of semi-professional athletes during walking 5km/hr and Jogging 8km/hr for 70 minutes in hot wet (Ta 40 C & 70% RH) and hot dry (Ta 31 C & 20% RH) test conditions.

Secondary Outcome Measures

Gender-Based Physiological Responses
Gender-based comparison of the increase in core body temperature of semi-professional athletes while performing various physical activities at 28 C WBGT
Heat Stress Indices
Comparison of Physiological Heat Strain (PHS) and Wet Bulb Globe Temperature (WBGT) index for evaluating heat stress in sports settings based on the core body temperature responses from semi-professional athletes.

Full Information

First Posted
August 2, 2023
Last Updated
October 9, 2023
Sponsor
University of the Punjab
Collaborators
Lund University
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1. Study Identification

Unique Protocol Identification Number
NCT06084494
Brief Title
Validation of Heat Stress Limit Values for the Athletic Performance
Acronym
HSL-AP
Official Title
An Experimental Investigation of Physiological Responses in Semiprofessional Athletes: Comparing the Impact of Climatic Conditions, Physical Activity, and Gender
Study Type
Interventional

2. Study Status

Record Verification Date
October 2023
Overall Recruitment Status
Completed
Study Start Date
October 21, 2012 (Actual)
Primary Completion Date
February 1, 2013 (Actual)
Study Completion Date
December 30, 2013 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Principal Investigator
Name of the Sponsor
University of the Punjab
Collaborators
Lund University

4. Oversight

Studies a U.S. FDA-regulated Drug Product
No
Studies a U.S. FDA-regulated Device Product
No
Data Monitoring Committee
No

5. Study Description

Brief Summary
Three male and three female semi-professional athletes, ranging in age from 22 to 27, participated in a study that was done at Lund University in Sweden to examine their physiological responses. The temperature and relative humidity were adjusted at 40 degrees Celsius for hot, dry conditions and 31 degrees Celsius for hot, wet conditions, respectively. The participants were instructed to engage in physical activity on a treadmill within the chamber for 70 minutes, or until participants were able to continue their exercise without difficulty within the allotted period. Participants were instructed to walk (5 kph) and run (8 kph). Participants pulse rate, breathing rate, oxygen consumption, and subjective reactions were all recorded. On the basis of the Wet Bulb Globe Temperature (WBGT), a heat stress index, the American College of Sports Medicine has made certain suggestions. The technique used to determine the temperature on a Celsius scale took into account the influences of relative humidity, air temperature, wind, and direct sunlight radiation. The American College of Sports Medicine advises delaying athletic competition when the WBGT is above 28 degrees. In the climate control chamber, the trials were carried out in high-risk circumstances (28 degrees Celsius WBGT). According to the study's findings, exercise is influenced by weather, and as air temperature rises, so do the intensity of exertion and thermal feeling.
Detailed Description
Methodology Experimental research design Study Duration 6 months Study Centres Thermal Environment Laboratory, Department of Design Sciences, Faculty of Engineering (LTH), Lund University Main Objectives Objective 1: To examine the physiological responses (skin temperature, core body temperature, body temperature, heart rate, and oxygen uptake) of semi-professional athletes during physical activity in different climatic conditions (hot wet and hot dry) Objective 2: To compare the effects of physical activity intensity (5 km/hr and 8 km/hr) on the physiological responses of semi-professional athletes under varying climatic conditions. Objective 3: To investigate the influence of gender on the physiological responses of semi-professional athletes during physical activity in different climatic conditions. Objective 4: To assess the suitability of the Physiological Heat Strain (PHS) and Wet Bulb Globe Temperature (WBGT) index for evaluating heat stress in sports settings based on the findings from semi-professional athletes. No. of Participants Six semiprofessional athletes including three males and three females with a mean age of (24.7 ± 2.1 years) and a body surface area mean of (1.8 ± 0.2 m2) participated in this study. Main Eligibility Criteria Key factors to consider when defining semiprofessionals include participation in regional competition level, receiving monetary compensation for their sports participation, participating in sports activity in the last six years, and skill level. These athletes typically demonstrate a higher level of skill and performance than recreational or amateur participants.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Physiological Stress, Heat Stress, Sports Injury, Heat Stress, Exertional
Keywords
Heat Stress, Physiological Responses, WBGT, PHS

7. Study Design

Primary Purpose
Prevention
Study Phase
Not Applicable
Interventional Study Model
Factorial Assignment
Model Description
A wet Bulb Globe temperature (WBGT) level of 28 °C was simulated, and the temperature within the climatic chamber was set at 40 °C and 31 °C at relative humidity levels of 20% and 70%, respectively. Four test conditions were designed and subjects ran at 8 km/h and walked at 5 km/h for up to 70 minutes.
Masking
None (Open Label)
Allocation
Randomized
Enrollment
6 (Actual)

8. Arms, Groups, and Interventions

Arm Title
Test Condition 1
Arm Type
Experimental
Arm Description
Variable Test Condition 1 WBGT 28 °C Clothing High Visibility Air Temperature 40 °C RH % 20 % Vapor Pressure 2.3 kPa Walking Speed 5 km/h Time 70 min
Arm Title
Test Condition 2
Arm Type
Experimental
Arm Description
Variable Test Condition 2 WBGT 28 °C Clothing High Visibility Air Temperature 40 °C RH % 20 % Vapor Pressure 2.3 kPa Walking Speed 8 km/h Time 70 min
Arm Title
Test Condition 3
Arm Type
Experimental
Arm Description
Variable Test Condition 3 WBGT 28 °C Clothing High Visibility Air Temperature 31 °C RH % 70 % Vapor Pressure 3.1 kPa Walking Speed 5 km/h Time 70 min
Arm Title
Test Condition 4
Arm Type
Experimental
Arm Description
Variable Test Condition 4 WBGT 28 °C Clothing High Visibility Air Temperature 31 °C RH % 70 % Vapor Pressure 3.1 kPa Walking Speed 8 km/h Time 70 min
Intervention Type
Diagnostic Test
Intervention Name(s)
analytical determination and interpretation of heat stress using calculation of the Predicted Heat Strain and Wet Bulb Globe Temperature
Intervention Description
The temperature inside the climatic chamber was set at 40 C and 31 C at a relative humidity of 20 % and 70 % respectively to count for a WBGT level of 28 C. The subject does walk at 5 km/h and jog at 8 km/h under these conditions for up to 70 minutes. The test includes the measurement of the height and weight of the subjects, heart rate, oxygen consumption, body weight loss (sweat evaporation), skin temperature, and core body temperature under hot environmental conditions. Subjective responses will also be recorded. WBGT was recorded after every ten minutes by heat stress meter and Bruel Kjaer.
Primary Outcome Measure Information:
Title
Physiological Response
Description
Rate of change of skin temperature (Tsk) of semi-professional athletes during walking 5km/hr and Jogging 8km/hr for 70 minutes in hot wet (Ta 40 C & 70% RH) and hot dry (Ta 31C & 20% RH) test conditions.
Time Frame
70 minutes
Title
Physiological Response
Description
Rate of change of core body temperature (Tcore) of semi-professional athletes during walking 5km/hr and Jogging 8km/hr for 70 minutes in hot wet (Ta 40 C & 70% RH) and hot dry (Ta 31 C & 20% RH) test conditions.
Time Frame
70 minutes
Title
Physiological Response
Description
Rate of change of Heart Rate (HR bpm) of semi-professional athletes during walking 5km/hr and Jogging 8km/hr for 70 minutes in hot wet (Ta 40 C & 70% RH) and hot dry (Ta 31 C & 20% RH) test conditions.
Time Frame
70 minutes
Title
Physiological Response
Description
Consumption of oxygen (VO2 Max ml/min/kg) of semi-professional athletes during walking 5km/hr and Jogging 8km/hr for 70 minutes in hot wet (Ta 40 C & 70% RH) and hot dry (Ta 31 C & 20% RH) test conditions.
Time Frame
70 minutes
Secondary Outcome Measure Information:
Title
Gender-Based Physiological Responses
Description
Gender-based comparison of the increase in core body temperature of semi-professional athletes while performing various physical activities at 28 C WBGT
Time Frame
70 minutes
Title
Heat Stress Indices
Description
Comparison of Physiological Heat Strain (PHS) and Wet Bulb Globe Temperature (WBGT) index for evaluating heat stress in sports settings based on the core body temperature responses from semi-professional athletes.
Time Frame
70 minutes

10. Eligibility

Sex
All
Gender Based
Yes
Gender Eligibility Description
Six semiprofessional athletes including three males and three females with a mean age of (24.7 ± 2.1 years) and a body surface area mean of (1.8 ± 0.2 m2) participated in this study.
Minimum Age & Unit of Time
22 Years
Maximum Age & Unit of Time
27 Years
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Eligibility Criteria
Inclusion Criteria Semiprofessional aged 22-27 years of both genders. Body surface area between 1.5 to 2.5 m2 Semiprofessional participating in regional competition level, receive monetary compensation for their sports participation, participating in sports activity in the last six year, and skill level. Semiprofessional demonstrating a higher level of skill and performance than recreational or amateur participants . Exclusion Criteria Subjects should not have any known heart disease or circulatory disorder. No known respiratory disease or heat allergy. No habitual smoker or drug user.
Facility Information:
Facility Name
Department of Public Health, University of the Punjab
City
Lahore
State/Province
Punjab
ZIP/Postal Code
54500
Country
Pakistan

12. IPD Sharing Statement

Plan to Share IPD
No

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Validation of Heat Stress Limit Values for the Athletic Performance

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