These are the four areas of heart rate data you need to pay attention to

World Heart Day is upon us and we’re seizing the opportunity to look at the importance of smartwatches and wearables when it comes to maintaining good heart health. For those who don’t know, World Heart Day was set up to shed a light on the importance of heart health and the ongoing plight of heart disease which, according to the WHD organisers, claims the lives of more than 20.5 million people each year. As startling as those numbers are,

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