A little exercise before Kitty gets up (5-2)

I believe the answer is:

press-up

But I can't explain it at all!

(Other definitions for press-up that I've seen before include "Keep-fit exercise" , "PE exercise" , "Gymnastic floor exercise" , "Face-to-the-floor exercise" , "Arm exercise while lying face down" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app