You might be hooked up to the monitor only as long as you're in the hospital. But telemetry monitors can be used to gather data on your heart for up to 30 days.

Speaking of workouts, the heart rate monitor is waterproof down to 30 meters so you can swim ... The ring is comfortable ...

When used correctly, the best heart rate monitors can help you unlock a new level of athletic performance, no matter whether you're cycling, running, or performing any other endurance sport.