Wearing a smartwatch can help you live longer, claim researchers, saying wrist-worn devices encourage people to exercise more, adding two years to their lifespan. A study carried out on 420,000 adults shows those using the gadget’s health tracker did five days of extra activity every month, which as per the Apple watch study translates into two additional years of life.

Volunteers were more physically active when they used the watch and offered a reward scheme, compared to those without these incentives.

In the study findings, overweight people and those least active showed the most considerable progress. Wrist-worn devices upped their exercise levels by a third over the two-year study, and boosted users’ life expectancy by an additional two years.

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