Biggest Loser Cardio Max is a workout I use often because there are 3 full body workouts that are only 10 minutes long. I own numerous workout dvds that are between 25 minutes long or less. This particular workout does not disappoint. There are 3 fitness instructors featured on this workout dvd. The fitness instructors are: Jillian Michael, Bob Harper and Kim Lyons. In my opinion all three workout levels are very tough to get through. There is a lot of cardio, weight lifting, squats and lunges. I had to take several breaks while doing this workout. After a week of doing this workout I was able to complete the first level with no problems. This workout will make you sweat and burn calories. I have personally lost 6 pounds from using this workout dvd. I still include this workout dvd into my workout rotation. This workout is perfect if your short on time and want a short effective workout dvd.