getting fit takes time, your best bet would be to maybe post this is a sports forum of some sort and ask people there, i dont know

to strengthen your lungs, do a search for the powerbreath thing!
heres what i mean, this is a UK site tho so you prob wana look somewhere were u live!

http://www.boysstuff.co.uk/product.a...8&cid=15&scid=

im using one and it really does help.

hope this of of help to you!