A euphemism for "aging": "evolving."

Example:

One of my wise [yoga] teachers told us that after 50, she began to cross off the list poses that she no longer felt made sense for her evolving body.

Cue the episode of "Outer Limits" where David McCallum enters the evolution machine:



Tip for "wise" teachers: You're not evolving. And why you find the notion of evolving more comforting than aging is a mystery you might want to ponder.

"Your ignorance makes me ill and angry."

Also... here's the trailer for "Altered States":