Differences Between Working Out in Your 20s and Your 30s

Boobs:
20s: I'm wearing two sports bras for added support.
30s: I'll pay any amount of money for a bra that'll make my sagging boobs look as perky as they did in my 20s.

Hands:
20s: I better get a manicure so my hands look pretty in Down Dog.
30s: Who cares about my nails? Yoga better help my arthritis.