Sitting still at a keyboard and typing away for hours and hours a day is necessary from time to time, but if a writer works this way for long periods back ache, sore shoulders and stiff neck may become problems. This is exactly why some authors occasionally try and write standing up. I have tried it myself, and it is not as crazy as you might imagine.
Ernest Hemingway used to write standing up every now and then. He is not only writer who has discovered alternative ways to write – other than sitting down in a study at a keyboard. How about writing naked as J.D. Salinger did? Here is an infographic Unusual Work Habits of Great Writers by Ninja Essays.
Infographic from Ninja Essays.