Dust-size sensors could heal you from the inside

Want to skip wearing your Fitbit or Jawbone when you’re out for a run or hitting spin class?
More importantly, think one day that people with epilepsy could live symptom free or a paraplegic could walk again? Or a soldier who’s lost a leg could control a robotic limb with his thoughts?
All of those cases could happen because scientists are developing sensors the size of dust particles that would work inside the body to keep track of how much we’re exercising, to stimulate the