title: How can I detect if the user is walking/running with his device?
body: <p>simple question hard answer:</p>
  
  <p>I'd like to be able to read if the device (and the user) is running/walking holding his device. I know that the iPhone accelerometer calculates acceleration so if the user runs at a constant speed, there will be no signal spotted.</p>
  
  <p>Any help on that ?</p>