Being someone who has lost over 120 pounds and who continues to maintain a healthy lifestyle and continuous weight loss goals, I could not stress enough the power of cardio and the affect it has had on my life. Cardio, along with weight training is you greatest allie in the battle of the bulge. Like any new venture you cannot simply dive into a cardiovascular routine, you must start at a level that you are comfortable with and work your way up.
If your initial desire is to lose that stubborn belly fat or simply wish to trim down your thighs, you need to do a minimum cardio routine of 3 times a week for 30 minutes to 45. If just thinking about 45 minutes of continuous cardiovascular activity gets you tired, just start small. About 20 minutes 3 times a week will do. If you are able to achieve cardio 7 days a week comfortably, than go right ahead. However, you should not exceed an hour and a half because, your body will begin to burn muscle instead of fat. Always try and spice up your routine as often as you possibly can. One day do the elliptical, the next day try cycling, or take a nice jog around your neighborhood. Never keep with the same exercises, especially if you are not doing endurance training and changing up your distance and speed.
As you begin to build up your endurance and realize that you are becoming comfortable with your time and pace, step it up. Every 3 weeks add ten minutes to your routine or a quarter of a mile, if running is your forte. If running is you idea of a fat busting workout, you need to make sure that you are taking care of your body with good quality running shoes. I have found that for my back problems and shin splints, Asics are the best shoe for the job. Your tread on your shoes should not be worn and you should have great arch and ankle support to help prevent careless accidents and fatigue.
If endurance is your goal try 30/30 exercises. First, always stretch before attempting cardio, no matter what your goal may be. Secondly, with a stopwatch in hand begin at a comfortable low impact pass for 30 seconds. When you reach 30 on your clock, begin running at the most intense pace you can muster. Continue to do 3 30/30 sets for about 2 week. After 2 weeks, up your time to a complete minute and continue increasing by 30 second intervals every 2 weeks there after.
Always remember that starting off with baby steps is not a bad thing. Just beginning a cardio routine is a step in the right direction. Losing weight the healthy way takes time and results will not happen overnight. In the long run you will maintain a healthy lifestyle and be doing something great for your body that will only continue to provide you with amazing benefits.