HElp me to check the grammer mistakes

On the other hand, you should do more exercise. Health experts say that (no the) youths do limited exercises, which is not good for their health. It is because exercise can help you to burn out the excess calories. Therefore, you should do exercise at least 30 minutes everyday. You can go swimming, running or do some simple exercise just like walking and skipping. After that, you will feel tired but comfortable. Do you have the same experience?
If you want to improve your fitness, you should know your health status you are now.(Although “you are” already has the meaning of “now”, it is common in a speech for us to use some words repeating the same message (like “now”) to make a deeper impression to our readers)Then, you need to maintain a balanced diet and do more exercise. These are the best and the easiest ways to improve your health. Guess what? Just do it! (Using “Guess what? Just do it!” is a perfect way of ending a speech. However, we should make sure our reasoning is correct. For example, here “Guess what?” cannot fully convey what you want to stress. If you put something before or after this phrase, it will make a perfect ending. For example : How can we know these are best way to improve our health? Guess what? Just do it!)

On the other hand, you should do more exercise--s. Health experts --said that the youths --should --not do limited exercises, which is not good for your health. It is because it can help you to burn out the excess --calories. Therefore, you should do exercise --for at least 30 minutes everyday. You can go swimming, running or do some simple exercises just like walking and skipping. After that, you will feel tired but comfortable. Do you have the same experience?
If you want to --improve your fitness, you should know how healthy you are. --Therefore, you need to maintain a balanced diet and do more exercises. This are the best and the --easiest --way to improve your health. Guess what? Just do it!


it may be wrong but i think it is correct

2008-10-07 11:28:34 補充：
the youths --do limited exercises is not good for your health.

On the other hand, you should do more exercises. Health experts had said that the youths who do limited exercises are not good for their health. It is because exercises can help you to burn up your excess carlories. Therefore, you should do exercise at least thirty minutes everyday. You can go swimming, running, or doing some simple exercies just like walking and skipping. After that, you will fell tired but more comfortable than before. Did you ever have the same experience?
If you want to improve your fitness, you should know how healthy you are now. Then, you need to maintain a balance diet and do more exercises. This are the best and the easliest ways to improve your health condition. Guess what? Just do it!