Technology You Can Swallow: Moving Beyond Wearable Sensors, Researchers Are Creating Ingestible Ones.

Around 6 p.m. each evening, the streets of Boston's suburbs come alive with the physically fit and those aspiring to be. They are runners, bikers, walkers, and scooter riders of all different body shapes and ages who would seem to have little in common except one thing-an electronic band wrapped around their wrist. For many of these people, it's hard to imagine life without the daily nagging from a personal health device to meet their daily prescript of 10,000 steps.