Kathleen Turner undergoes physical therapy every day to ensure her rheumatoid arthritis doesn't affect her acting ability.
The Romancing The Stone star was diagnosed with the condition in the early 1990s and takes medication to control her symptoms.
She is currently starring as a recovering alcoholic nun in a New York production of High, and the actress receives daily treatment to make sure she's fit to take to the stage.
Turner tells New York Post columnist Cindy Adams, "I'm exhausted. Rehearsing all day, working all night. I also need a break from 12-hour days. I have to get my mind off the lines, so I'm taking in hot food and reading a book.
"I've had to watch that all those medications didn't hurt my voice. That was a factor. I also do physical therapy every morning.
"I have to keep moving. I'm compelled to force my joints to work in order to maintain agility eight shows a week.
"Three women come to train me and teach yoga for strength and movement, or my body will freeze up.
"That also releases breath, so air floats through the vocal chords, giving a chance to keep my vocal cavities in shape. I watch my voice. I'm straining it all the time.
"So no phlegm builds up, I gargle to keep it moist. My dressing room has a humidifier."
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