the best cardio is swimming, but I don't know if you can try this if you don't have access to a pool
This is a bunch of crap! I was in competitve swimming for 15 years. Swimming may feel hard but it is not an efficient way of burning calories. If you want to burn calories you have to use your legs. Most swimmiers don't even kick, we just do this little twitch to keep our legs from becoming anchors. Stick to the stair machines, Elipitcals, or just plain running / jogging. If you want to loose the fat I suggest you change up your diet. Here is what I recommend, being that I am 6' 4" and 230 we have similar body types.
1. Remove all the sugar from your diet
2. Drink at least a gallon of water / day ( get yourself some crystal light or the generic stuff ( artificially sweetend ), fruit punch is my favorite )
3. add a cup of fibrous vegtibles to your diet with each meal. ( brocclie works well for this, cheep too ).
4. live off tuna, Eggs, and chicken breasts
5. Start taking an ECA stack.
6. No alcahol!!!
7. Occasionally push yourself hard enough in your cardio routine that you have to puke to feel better.
8. Take an Multivitimen.
If you don't have the body you want in 6 weeks of doing this, see a doctor and get some blood work done to check for low Test Levels.