I get many ... ... "losing those extra few pounds and extra layer of fat." This always brings me to the ... ... "What is it and how much should I do?” Well, let's sta
 
                    I get many questions regarding "losing those extra few pounds and 
  extra layer of fat." This always brings me to the cardio/aerobics 
  question. "What is it and how much should I do?” 
  Well, let's start with what it is. "Cardio" literally 
  means "having to do with the heart and blood vessels." It is essentially low- 
  impact repetition training that helps to improve 
  your overall cardiovascular health. 
  Cardio is one of the best ways to burn a lot of 
  calories while losing extra bodyfat and giving your metabolism a big boost. 
  Cardio exercises are those that raise your heart 
  rate to 65-90% of your maximum heart rate. Now, 
  you may be thinking: "How do I find out what my 
  maximum heart rate is?" 
  An easy way to figure out your maximum heart rate is 
  to subtract your age from 220. For instance, the 
  maximum heart rate for a 28-year-old should be 
  192 ( 220-28=192). To figure out your cardio range, 
  multiply your maximum heart rate by 65% and 90%. 
  So, the cardio range for that same 28-year-old should be 
  between 125 and 173 ( 192 times .65 = 125 and 192 times 
  .90 = 173). 
  Just remember, a general rule of thumb to follow is 
  that if you are having trouble talking because you 
  are gasping for air, you are working too hard. On 
  the other hand, if your breathing rate hardly 
  changes, you aren't working hard enough. 
  Cardio has many benefits, from; reducing blood 
  pressure, improving heart health to improving lung 
  function. Amidst all of these good reasons to do 
  cardio work, the biggest reason for most people is to 
  lose fat. How much should you do though? 
  If you are a beginner, or if you just haven't done 
  any cardio activities for a few months, you 
  should limit your first few sessions to only 10-15 min. 
  After you've done it for a few weeks and have built up 
  some endurance, you should increase your cardio 
  sessions to 20-60 min. You begin to burn more fat 
  than carbohydrates after 20 minutes. Because of this, 
  shorter cardio sessions are best for maintaining your 
  current weight, while longer sessions are best for losing 
  weight. 
  If you just want to maintain your current weight then 
  60-90 minutes PER WEEK will usually be adequate. How 
  you choose to split that time up during the week is your 
  choice and depends on your level of endurance. 
  If your goal is to burn as much bodyfat as you can, 
  2-5 hours of cardio PER WEEK will be sufficient. 
  Your sessions should be 40-60 minutes in length. 
  The best time to do your cardio sessions 
  for maximum fat loss is right away in the morning before 
  you eat anything. After you've been asleep for 6-8 hours, 
  the level of sugar (glucose) in your blood is very low and your 
  body will use stored fat as an alternative energy source. 
  If you are consistent with your cardio workouts and 
  can incorporate them into your life, you will see results!