You need to do more physical exercise Write a letter to your friend asking him to join you In your letter you should tell why you want to do physical exercise what type of physical exercise you are planning to do why you want your friend to join you

Dear Mike,
I'm just writing to let you know I decide to start training in the gym that is located near my office because of my health's deterioration in recent time, which makes me overweight and sleep around 6 hours per day. After I get advice from the doctor of my company and consider sports suiting to my health condition, I think running is the best activity for me since I can use a treadmill machine in the gym and take 30 minutes every morning to perform this type of sport. I know that your health is not good at the current and I'm really happy if you join this gym with me due to the special discount policy for trainees who register with their friends, you can be free in the first month and reduced 50% membership fee during 1 year.
I hope you can take into account my suggestion and respond to me as soon as you can owing to the promotion of that gym lengthen 3 weeks.
Kind regards
Harry