Oh noooo! For some reason, each of us has a head that weighs about 11 pounds. Apparently that's the trade-off we make for our big, beautiful brains. Luckily, the neck and spine are designed to support this weight, as long as it's well-balanced. The problems start when we tilt our heads forward, like when we're on our phones. Which is, on average, three hours a day. Yikes!