These revolutions are going to be tiny. Some of them are almost invisible. But technology is bringing major changes to health and fitness, from daily workout trackers to crucial preventive techniques. Workout trackers are about to get even more amazing, with devices that track not just your speed and incline data, but extreme data like G-Force. And webcam personal trainers will take some of the cost barriers and time commitment issues out of daily workout routines. Meanwhile, fitness equipment isn’t the only thing that’s getting easier and easier to bring into your own home; medical devices are coming there too. Checking, recording, and analyzing your vital signs will be possible with a wearable sticker so thin it’s basically a “tattoo,” and online methods of sharing information with your doctor will transform doctor’s visits and annual physicals forever. But can you imagine a small implant that can predict a heart attack within three or four hours before it might happen?