

The origins of the Finnish sports instruments producer Polar Electro can be traced back to the need of cross-country skiing.
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In a reaction, Polar ended some of the online functionality of sharing routes on the map. In July 2018, Dutch newspaper De Correspondent revealed that Polar's fitness app shows users on the map, making it possible to find out their real names, profession and home addresses. In November 2015, Polar released its first optical wrist-reading heart rate monitor, the A360. In part due to its own history and the affiliation with universities and the scientific community, Polar offers a research co-operation programme focused on supporting studies in exercise science. Polar technology and devices are widely used in various scientific studies as well as being adopted by many university research departments.

In 1982, Polar launched the world's first wearable wire-free heart rate monitor, the Sport Tester PE 2000. Its late founder Seppo Säynäjäkangas (1942–2018) was the inventor of the first wireless EKG heart rate monitor. Polar was founded in 1977, and filed its first patent for wireless heart rate measurement three years later.
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In 1975, there was no accurate way to record heart rates during training, and the idea of a wireless, portable heart rate monitor was conceived on a cross-country skiing track in Finland.
