No. So long as you're fit enough to handle it, you should be alright. Be sure to remain hydrated and if you're already at a good weight, be sure to replace most of the calories burned so you can continue to maintain such a high level of activity.
Intervals
Yes. Cardio exercise burns calories, both glucose and fat. Lower body fat means better definition. It doesn't have to be intense cardio--fat is metabolized at a constant rate, regardless of intensity--just put in the time.
It can get boring after a while if you don't increase the intensity and if you don't increase it,it won't work on or improve your cardio.
Bring it up to your target heart rate by increasing intensity.
Some cardio exercises for weight loss are walking, aerobics, stepping, and cycling.
Low-impact,moderate impact and high impact
You do regular and extended cardio workouts at mid to high intensity. Running, skating, bicycling, aerobics - that kind of stuff.
Cardio vascular exercise such as cycling, rowing, running! These should be completed at high intensity for maximum calorie burn!
I would think the best high intensity workout would be a cardio workout and it gets your body working and the heart and pulse up. Here is a site for you to checkout www.bodybuilding.com/fun/wotw89.htm
Aerobic exercise is also called cardio exercise. This exercise is low intensity and focuses on generating aerobic or oxygen related energy.
Time, acceptance of your situaiton and, if you mean literally, a 5-man cardio team :}
When losing body fat it is more important to eat well than to exercise well. So, first, get your nutritional program in order. For example, 5 or 6 smaller meals daily; plenty of protein from natural sources at each meal and no refined processed carbohydrates. Get your carbohydrates from fresh (preferably organic) vegetables and fruits such as berries. Meanwhile, you can begin to condition yourself for both high intensity cardio exercise as well as strength training. Once you are eating properly, getting two brief (10 or 15 minutes) cardio sessions of sufficient intensity weekly, and two 30-minute strength training sessions weekly, you have a program you can use for life. Of course, before changing any major diet or exercise habits, obtain your physician's approval in advance. .