A Fun (Really!) 12-Minute Cardio Interval Training Program

Looking for a fun way to get more out of your walks, jogs, cycling or other cardio? Try the 10-20-30 workout, a 12-minute interval training program that works and is fun.
1.    Warm up.
2.    Walk (or jog or bike or row) for 30 seconds at what you consider a “gentle” pace.
3.    Increase the pace to “moderate” for 20 seconds.
4.    Increase the pace to “hard” for 10 seconds.
5.    Repeat 4 times for a total of 5 minutes of exercise.
6.    Rest for 2 minutes. Don’t come to a complete stop; move slowly, but keep moving.
7.    Repeat Steps 2-6.
8.    Cool-down.
9.    Stretch.
Here’s a good article about 10-20-30.