Certainly being overweight can cause shortness of breath with exertion. When there is more weight to carry around, more calories get burned with each given movement and therefore more oxygen needs to be used. This can cause one to get short of breath with any type of exercise. If you are getting short of breath at rest, it would be difficult for me to chalk that up just to you being overweight. In addition, the fact that you may be wheezing suggests that there may be another reason that you are short of breath. What you need is to have a full examination by your primary care physician
including a lung examination. Your doctor
should be able to tell you if you are wheezing. A simple breathing test called a peak flow test can help tell if you have an obstructive lung disease such as asthma
. Other testing including full pulmonary function testing may be required to work it out. If you are not wheezing, and your breathing tests are normal, then you may need other testing to figure out why you are short of breath. This may include an evaluation of your heart with an echocardiogram or possibly an exercise stress test. I hope you feel better soon.