why is a person who is exercising heavily get a red

[sweetdudeee]

face (flushed)?

[quistz]

Because their blood is pumping hard, increasing pressure in blood vessels causing them to expand and give the skin a flushed look.

[Peruv]

maybe his/her blood pressure goes up.

[EL CHINGON DE DURANGO]

When exercising in the heat, your core body temperature rises more rapidly therefore you turn red

[jacovkss2]

What does this have to do with Programming & Design, the forum you posted this question in?