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

Workout Motivation:
20s: To look cute and because it's fun.
30s: Because none of my jeans zip and so I don't get some horrible disease and die.

Types of Workouts
20s: I'm all about fun, fast, challenging, and crazy!
30s: How about something simple with the least risk of injury?

Workout Attire:
20s: The wilder the better!
30s: Basic and black (and boring).