Cardio workout in the gym

No chance for a well-muscled with a high percentage of body fat. So do not neglect cardio at the expense of power exercises. Combine them for a successful outcome. 
If you insist on training hard in the gym, not to engage in other aerobic activities, giving due attention to a treadmill, bike, cross trainer or stepper. In addition, to reduce the percentage of body fat, cardio exercise improves circulation and normalizes heart function. Reduce stress and tone up.
To burn fat if you're in bad shape, start with low-intensity, long cardio workouts, slowly walking on a treadmill. If you are in good shape to bet a high intensity cardio - running down the aisle, fast pedaling a stationary bike or cross trainer with a high degree of load. Cardio workout should be done 3 to 5 times a week, 20 to 40 minutes. For beginners, 20 minutes, three times a week are sufficient. In case of insufficient duration cardio is not effective, and in excess would lose muscle mass.
For bigger people are advised to do cardio 3 to 5 times a week, in order of 30-35-40 minutes slow motion. You can use the slope of the path to get into the part and buttocks. And for those who just want to stir, offers three sessions a week, with moderate to fast pace.
Morning glucose content in the blood and muscle glycogen is low, and the body temperature and heart rate are reduced. This is the best time for cardio workout as hard to burn fat and speed up metabolism. 
Before cardio take only foods rich in protein and amino acids, and avoid the consumption of fats and carbohydrates.
Before you start cardio, start with a warm up 3-5 minutes. And in the end gradually reduce the pace to normalize pulse.
And remember: Persistence is the key to good shape and attractive look!