He took a break from work to walk around the block during a stressful day, and noticed he felt out of breath strolling up a slight incline. This isn’t normal, Green thought. He had become an avid cycler in recent months and wasn’t exactly out of shape. He sat down at his desk, and looked at the Apple Watch on his wrist.
His heart rate was through the roof, and the HeartWatch app he was using to check his pulse was flashing warnings. Maybe it was something more serious, he thought.