Take up space. Stretch. Move your body.

“God gives you one gift: You get to be born,” the choreographer Twyla Tharp said. “Thereafter, you’ve got to take care of it yourself.”

Her new book, “Keep It Moving: Lessons for the Rest of Your Life,” doesn’t have anything to do with chasing youth. No, no, no — to Ms. Tharp, 78, that is a losing proposition. But it’s not over until it’s over. “The figures are still shocking in terms of people who don’t exercise or who are not aware of the reality that diet is actually extremely important,” she said. “If you want to have a future, you’ve got to provide for that now.”

And Ms. Tharp, a dance pioneer and Tony-Award-winning choreographer, is ready to assist. She has already written two books about how to better yourself using the tools of an artist: “The Creative Habit” (2003), a best seller, and “The Collaborative Habit” (2009). “Keep It Moving,” a follow-up, applies those tools to finding purpose and growth as you age, no matter what age you are.