Here is the article with the levels.
I am currently a level 1 person.
I cycle to work every day, but that barely gets up my heart rate, and it only takes 15 minutes each way. So I guess picking up the couch-5-k plan again would be a good idea.

From the site:

Level 1

This is the ground floor of movement. Your daily life may involve constant walking; perhaps you’re a nurse or teacher. Or you make a conscious effort to move during the day. You take the stairs at work or walk during your lunch break. You aren’t involved in a structured fitness plan, but you search for ways to squeeze in some form of movement on a somewhat regular basis.

Light aerobic exercise: 60 to 90 minutes per week
or
Steps per day: Approximately 3,500 to 5,999
Strength training: None

Level 2

At level 2, you follow a structured and consistent, although moderate, exercise plan. You stick to at least three, 30-minute workouts per week. Your workouts may vary from the treadmill or stationary bike to a fitness DVD to a regular morning walk in the neighborhood. You don’t do any strength training.

Aerobic exercise: Three times per week for 90 to 150 minutes per week
or
Steps per day: Approximately 6,000 to 9,999
Strength training: None