A study involving sleep habits collected from Apple Watch users has been published by the Brigham and Women’s Hospital.

The Apple Heart and Movement Study stated that most people are not getting enough sleep each night based on data collected in Apple Watch. The research involves more than 42,000 users and approximately 2.9 million sleep days.

The study revealed that only 31% of people are getting a minimum of seven hours’ sleep. As per the American Heart Association, the recommended amount of sleep for adults is between 7-9 hours, and not hitting the target consistently can lead to increased risk of higher blood sugar, cholesterol levels, and blood pressure, and obesity, depression, dementia and cognitive decline, and cardiovascular disease.

Apple announced the Apple Heart and Movement Study in 2019 and encouraged Apple Watch users to join by downloading the Research app or Health app on their iPhone, both of which are free.