'Orangetheory Fitness' can be red hot when it comes to losing weight and charging metabolism

MILWAUKEE (CBS 58) -- As long as you can see colors and count to five, Orangetheory Fitness might be the perfect workout for you.

It's all about heart rate-based interval training working through a handful of different zones designed to charge your metabolism and give you more caloric afterburn. This total body workout runs for an hour.

There are two groups: one on the treadmills and the other working with weights or on rowers. Just in time for the new year, there's also an eight week "Transformation Challenge." $1000 prizes are up for grabs for the top winners.

By the way, the first Orangetheory class is always free. You can learn more about this kind of workout or even sign up for a class by going here.