Sticky dot used to measure heat on athletes

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Dangerous heat and humidity can be hard on athletes during practice.

A high school in Shelbyville is using a new product to prevent their players from getting heat stroke.

It's a sticker for the skin called the ionX Body Temperature Alert Patch, otherwise known as hot dots.

Officials say the waterproof black dot is stuck on a vein on the arm or neck, out of direct sunlight.

It measures the body's core temperature and when it turns yellow, that means danger and time to take a break until the color darkens again.

About two years ago, a football player at a Louisville high school died after a practice in the heat.

The alert patches were donated to the school and cost about 50 cents a piece and are available online, at .

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