The movie was adapted by Milton Gunzburg (uncredited), Alexander Knox, Mary McCarthy and Dudley Nichols from the book And They Shall Walk, by Elizabeth Kenny and Martha Ostenso. It was directed by Nichols.
Kenny's victory was a Pyrrhic one: a revised treatment for a disease in its twilight, promulgated by a woman in her twilight.
SisterKenny wrote of a physician who said he wanted to learn about her method and professed an open mind: "I have encountered many 'open minds' in the medical profession in many parts of the world, and I have learned to proceed with caution when I come upon one now.
Kenny was told sternly that muscle spasms did not exist, and that what she had observed were diseased, weakened muscles simply overcome by opposing muscles.
Kenny was born at Kelly's Gully, a hamlet a few kilometers west of the village of Warialda, New South Wales (NSW), Australia.
Kenny's seven years of rehabilitative work with that child, plus her experience with sick and wounded men during WW I was the foundation for her later work in polio treatment and rehabilitation.
Today, the SisterKenny Rehabilitation Institute is one of the leading rehabilitation centers in the United States, known for its progressive and innovative vision.