and literally our bodies are warm and so is our blood.
and it may be refreshing,
but it disrupts blood circulation in the body.
Just like eating ice cream,
we immediately get some headaches
because blood flow to some parts of our mouths
are slowed down or even cut off
because it freezes the blood on that part of the mouth
where the ice cream makes contact.
So when blood is subjected to something cold,
its circulation is slowed down or stopped
(depending on how cold it is)
and it can't do its functions anymore.
Drinking cold water is most especially dangerous
during or immediately after strenuous physical activities
like playing sports, doing exercise or workout sessions.
There are cases where players fainted and never made it,
pronounced dead on arrival.
Others survived but remained in hospital for weeks.
When blood flow in some part or parts of the body
is abruptly lessened or cut off,
blood supply is affected especially to the heart
that it may cause heart attack.
According to https://en.wikipedia.org/wiki/Myocardial_infarction,
A myocardial infarction (MI), also known as a heart attack,
occurs when blood flow decreases or stops to a part of the heart,
causing damage to the heart muscle.
MIs are less commonly caused by coronary artery spasms,
which may be due to cocaine, significant emotional stress
and extreme cold, among others.
Cold blood and cold bodies only belong to the dead
and not the living.