Heart problems, where the heartbeat goes haywire, are tricky to spot in everyday life. Doctors have been using smart tech to help, but they're still figuring out how much heart data is needed to make a good call. A new study dives into this, using AI to see how well it can tell if someone's heart is acting up, both when comparing different people and the same person ...

Ever wondered if being white, mixed-race, or black makes a difference in a soccer player's heart health? Researchers in Brazil decided to find out by studying male soccer players of different ethnicities. They were curious about how training might show up on an electrocardiogram (ECG), a test that checks the heart's rhythm and electrical activity. First, let's under...