Many of us wear devices that count our steps, measure our heart rate, track sleep patterns, and more. This information can help us make healthy decisions—research shows the devices encourage people to move more, for example—and could flag possible problems, such as an irregular heartbeat. Many of us wear devices that count our steps, measure our heart rate, track sleep patterns, and more. This information can help us make healthy decisions—research shows the devices encourage people to move more, for example—and could flag possible problems, such as an irregular heartbeat. Space Exploration Phys.org – latest science and technology news stories