One problem many people with COPD encounter is fatigue and low amounts of energy. Walking around your home can even be enough to make you want to sit down and take a break, also if you feel as if you are breathing fine. This is because your body is working harder to make sure you are getting enough oxygen throughout. Your lungs are working harder to take in enough air to get the oxygen to your bloodstream, which takes a considerable amount of energy, aka calories.
Those with COPD need to be sure they are getting the proper calories and nutrients on a daily basis since people with COPD use 10 times more calories than someone with healthy lungs. This doesn't mean you can eat high calorie, unhealthy foods – you still need to eat healthy to prevent other problems, like heart attacks or type 2 diabetes.
Maintaining your energy level is important because without energy you won't be able to do the things that will help keep you healthy, like getting an adequate amount of physical activity. Your body can't fight off illnesses without energy, either.