We now sleep in increasingly more upright and awkward positions, making it virtually impossible to have a restful sleep. Our neck muscles must now wrestle with gravity to hold up our heads. This can cause muscle strain and misalignment of the spine.More Seats. Less Room to Recline. Gravity.We cannot hold up our heads once we fall asleep. And as we travel more and sleep less, this can affect how we look and feel upon arrival at our destinations. Over time, these habits can have long-term health consequences.The Unavoidable TruthThe Travel Challenge