increase lung capacity...

just endurance.....keep going at it and you'll increase your endurance. when i have had pt's who have had pneumonia and CPOD, i have them take a big balloon and see how much air they can get into the balloon at once, so take as deep of a breath as you absolutely can then inhale into the balloon until you have no air left. Then i tell them to see how many times they can do that in like 1 min etc...