How The Heart Reacts at 200mph

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How does the human heart react to the most extreme forms of stress?

Using sports science technology, three very different riders at the International North West 200 motorbike festival, put this question to the test.

With top speeds hitting 208mph, on closed public roads around the coast of Northern Ireland, the North West 200 is one the fastest road races in the world. The motorbikes are often just inches from each other.

Three competitors were fitted with a heart strap and wireless sensor to measure their heart rate over every inch of the course.

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