<s>[INST] I have a problem with getting tired very easily. I am only 25 and am over weight but not massively. I play football a lot and had good stamina for my size. Over the past year I have suffered from getting tired VERY easily. Sometimes from walking for a few seconds. Which isn t normal at all. People say I look yellow a lot. When I am at football training my muscles feel strong, but after only a few minutes my lungs (I think) are shattered and I can barely move. What could this be? Thanks, Nick. [/INST] Hello, In my opinion, we should definitely rule out asthma or bronchitis for your symptoms. So consult pulmonologist and get done clinical examination of respiratory system and PFT (Pulmonary Function Test). PFT is showing obstructive defect then you will mostly improve with inhaled bronchodilators (formoterol or salmeterol) and inhaled corticosteroid (ICS) (budesonide or fluticasone). If PFT is normal then your symptoms are mostly due to obesity. So try to loose your weight. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr. Kaushal Bhavsar, Pulmonologist </s>