The study hinges on the early detection of atrial fibrillation (AFib), which is an irregular heart rhythm that causes poor blood flow and is a leading cause of stroke. While the link between atrial fibrillation and stroke is thoroughly understood, AFib has very few warning signs, making it difficult to diagnose until a stroke occurs. Johnson & Johnson and Apple are hoping that apps and the Apple Watch’s electrocardiogram (ECG) features will help detect AFib before a stroke occurs. This trial follows a Stanford study that found that the Apple Watch’s irregular heart rate monitoring features are accurate enough to use in a medical setting.

Since this is a virtual trial, participants don’t have to travel to a clinical trial site — they can partake remotely via a proprietary app. The Heartline study could help prevent strokes and deaths — AFib leads to 158,000 deaths per year — and could lead the way toward a new approach to clinical trials that leverage greater sample sizes and more consistent reporting. Those interested in participating can sign up at Heartline.com.

Swimmers will be able to view their heart rate in their line of sight, thanks to the Swim Goggles’ augmented reality capabilities and the tiny, see-through display inside one of the lenses. The Polar sensors will attach to the goggles via a strap and sit against the swimmer’s temple. Data will be transmitted wirelessly, and in real time, to the Swim Goggles. Data from completed swims will sync to the Form Swim App, which will match heart rate data with metrics like split times, stroke rates, pace and calories.

Heart rate tracking is extremely important to swimmers, especially when they’re doing splits. For the first time, swimmers will be able to see that data as they swim, without pausing or leaving the pool. “By adding it to the arsenal of metrics that our goggles already deliver, we’ll empower serious swimmers to make their training even smarter and more purposeful,” Form’s founder and CEO Dan Eisenhardt said.