"workout" videos at 5min

Zuzana tests out this abs and arms exercise for the first time.

http://www.diet.com/weight-loss-challenge/ Week 2 Join our weight loss challenge and watch your body get slim and sexy. Each week, the exercise routine will get increasingly difficult. Perform this routine 2x a week on nonconsecutive days.

Lorie Baker demonstrates her interval workout using an elliptical machine. The key is following a high intensity effort with a low intensity but active rest period.

Lorie Baker is at Chelsea Piers where she does an elliptical workout which is an incredible low impact exercise.

Perhaps you ate too much at Thanksgiving and will eat too much for Christmas. Fortunately Kim Strother has developed a killer workout to keep that Christmas sweater from feeling too tight.

Kim Strother demonstrates her functional weight training exercises using a cable machine by Precor.

Ian Morris demonstrates the basics of using a karate bo staff and how to incorporate its movements into a cardio workout.

Part 2 of this workout shows you how to strengthen your muscles, loose weight and burn fat - without any weights or equipment.

In this workout I am focusing on my abs, but each exercise that I am doing is also working another major muscle group at the same time. I do 2 minutes of cardio between each exercise and keep my breaks very short - just long enough to take a drink of water. Everyones fitness level is different, so you can either do more or less reps to customize this workout for yourself. If you keep a fast pace, you will find that the momentum will keep you going and keep you strong.

The fitness gals of Diet.com bring you a heart pumping circuit workout you can do anywhere while traveling for the holidays! http://diet.com/

Before you hit the slopes, get in shape to prevent injury and day after sore muscles. Personal Trainer Katrina gives you the best moves to do to get in the best shape this winter sports season. http://diet.com

No time to work out? Try this 4 minute interval workout video aka the world's fastest workout. Personal trainer and body transformation expert Stephen Cabral takes diet.com

Zuzana Light shows you how to shape and sculpt a perfect booty.

Zuzana Light shows you her hot train track workout.

Sit and Rotate for perfect obliques.