Why doesn’t temperature alone explain the result?
Humidity, sun, wind and exposure duration matter. Two days with the same air temperature can impose different heat stress.
What does a dew-point result tell me?
Dew point describes atmospheric moisture. It is not wet-bulb globe temperature and does not combine all the variables used in environmental heat-stress assessment.
Can I calculate my true fitness from a hot race?
A conditions scenario can show how an assumed penalty changes a score. It cannot prove what you would have run on another day.
How should I start the session?
Begin conservatively and reassess. A target from a cool race should not override unusually high effort or symptoms.
Where does this guidance come from?
Primary source and methodology. Use the calculator’s method notes for assumptions. Coaching decisions still require your context.
Use the related calculator