As airlines cram more and more seats onto planes, the distance between passengers and the seat in front is getting smaller and smaller.
We all know it's uncomfortable - insufferably so. But Canadian aviation expert Jan Davies warns shrinking leg room, or seat pitch, also has serious implications for passengers' safety in emergencies.
Prof Davies, the chair of the International Board of Research into Aircraft Crash Events, has told an aviation safety conference in Canberra cramped seats were making it difficult for passengers to adopt the brace position in a crash or emergency landing, according to the ABC.
"The seat pitch is the distance essentially between the back of the seat in front of you and your seat back, and airlines have been reducing that distance over the last decade or so," she said.
"If your seat pitch is less than 30 inches [76.2cm], you will not be able to brace properly if you are of average height ... as well as if you are a tall person or a larger person, because there's just not much space."