Wet Bulb Globe Temperature (WBGT)
WBGT is the internationally recognized standard for measuring environmental heat stress. Unlike simple air temperature, WBGT accounts for four simultaneous factors that determine how well the human body can actually cool itself under real-world conditions:
Ambient Temperature
Relative Humidity
Wind Speed
Solar Radiation Load
WBGT has been validated over decades of research and is the mandated heat stress metric across government, military, collegiate athletics, and occupational health.
Mandated by
U.S. Department of Defense
Used by all branches of the U.S. military to govern training and operational activity in heat.
OSHA
Recommended in OSHA Heat Illness Prevention guidance and the OSHA Technical Manual, Section III: Chapter 4.
osha.gov/heat-exposure ↗
ISO 7243
International standard for assessment of heat stress using the WBGT index.
Hydration Science
Foundational Research
The hydration recommendations in the Suayves App are informed by the following peer-reviewed literature:
Physiology of Fluid Regulation
Bhave G, Bhave N. Physiological Reviews. 2021.
Hydration and Health Outcomes
Popkin BM, D'Anci KE, Rosenberg IH. Nutrition Reviews. 2010;68(8):439–458.
Dehydration and Cognitive Performance
Adan A. Journal of the American College of Nutrition. 2012.
Sweat Rate and Individual Variability
Sawka MN, et al. ACSM Position Stand: Exercise and Fluid Replacement. Medicine & Science in Sports & Exercise. 2007.
Workplace Heat Safety Standards
OSHA Heat Illness Prevention Program
Occupational Safety and Health Administration
Guidance, enforcement frameworks, and the Heat Illness Prevention standard for outdoor and indoor worksite heat safety.
osha.gov/heat-exposure ↗
NIOSH Criteria for a Recommended Standard: Occupational Exposure to Heat and Hot Environments
National Institute for Occupational Safety and Health
ACGIH Threshold Limit Values for Heat Stress
American Conference of Governmental Industrial Hygienists
Heat, Climate Change and Work Protections
American College of Sports Medicine
Sports & Athletics Standards
NCAA Heat Acclimatization and Heat Illness Prevention
NCAA Sport Science Institute
Important Note
No Endorsement Implied. Suayves products reference these standards as informational context for the WBGT thresholds and hydration guidance we provide. Reference to these organizations does not imply endorsement of Suayves products by OSHA, the U.S. military, the NCAA, ACSM, NIOSH, or any other agency or organization. For complete guidance, always consult the original source materials linked above.
Suayves is an environmental awareness tool, not a medical device. See our Disclaimer for full details.