Sky Lift is a science fiction short story by Robert A. Heinlein, first published 1953, and collected in one of Heinlein's anthologies, The Menace from Earth.
In the story, a torchship pilot lights out from Earth orbit to Pluto on a mission to deliver a cure to a plague ravaging a research station. Due to the short time needed before everyone at the research station is dead and the long distance involved the torchship must accelerate at multiple gravities for days. The pilot is successful but is rendered an invalid due to the strain put on his body.