question: Hi I have been smoking for the last 10 yrs now(4 to 6 a day). Im 34. 30 Pounds over weight. I should be 170 and now Im close to 200. I had started walking on the threadmill for about two weeks for 45 mins to an hour then I was 208 pds. I lost 8 pds. Due to the walking my back started hurting, so I stopped its been two weeks now and the pain is gone. So will be continuing that again starting Monday. My height is about 5 feet 6inches. Have been working night shifts for about 11 years now. Sleepping habits are terrible 4 to 6 hours a day. I sometimes feel heaviness in my breathing or feel my heart has grown. Is there anything to worry about.