Would you please check and give me some advice for my writing?

• This is part of a letter you receive from an English friend.

“I enjoy my new job but I sit at a computer all day now. I don’t get much exercise. What do you think I should do to keep fit?”

• Now write a letter in about 120 words, giving your friend some advice about keeping fit.

Dear Anh,

How are you? Hope you are well there. I’m very happy to receive your letter.

If you work and must sit a computer all day, you should do fifteen minutes of gentle exercise every day. You can buy a mirror, two dumbbells and remember to do your light exercises. You may find it helpful to perform this exercise in front of the mirror. When you feel sleepy and tired, you should wash your face and stretch your arms and legs to relax your muscles. It's is important to get plenty of exercise and to eat the right foods. I recommend more exercise to full health. You can go swimming and running along the coast with your friends. You can go to the gym or join fitness club. Besides, you try to eat more nourishing food and have an adequate diet. You shall eat enough leafy vegetables and high-fiber foods. They are very good for health and reduce the risk of various diseases. I hope that you can find these suggestions useful.

I’m looking forward to hearing from you.

Best wishes,

Chung