Hi AaRoN_RoGeRs
Combat Medic and Stuble Jumper have very sound advice. Here are a few points and referances I would like to add.
1st - "Muscles". There is a notion out there that you can turn fat into muscle...this is false. However, the more muscle you have the more fat you burn (burnt as fuel). You only have a short period of time, however, think of muscle building as well. I am not saying become a body builder, its more like an exchange of muscle for fat. Be careful here....some people freak out when they work out so hard but see their weight stay the same or even go up....that is becuase muscle weighs more than fat, (you can call it a" good weight gain"). Further to that, 1 lb of muscle is more dense and takes up less volume then 1 lb of fat...(if that makes sense).
2nd - Sports drinks and Protien powder...I disagree with stuble_jumber on this. I feel they have their place. They should not be relied on, but used as a tool when needed. Depending on how hard you are working out a sport drink is very helpful. There is a condition called "Hyponatremia". It‘s basically a form of dehydration even though you are drinking large volumes of water. During hard work outs you loose alot of Sodium via your sweat. Sodium (electrolite) is important to the proper fuction of your muscles. If you have had a large loose of Sodium and have been drinking large volumes of water, you will actually be diluting the remaining Sodium in your system...resulting in a form of dehydration. I will include a link at the bottom for a better explanation. Sport drinks such as Gatorade help replace your electorlites. So continue to drink lots of water, but also sip on a sports drink while you work out.
Here is a link to a SEALs recruiting page for their pre-selection PT program.
http://www.sealchallenge.navy.mil/workout.htm It has 2 levels and talks about nutrition. Once your offically in the CF, you can requiest a copy of the JTF2 PT program from your local PSP....it also has a good PT program and addresses other issues such as overtraining and nutrition. You can tailor the programs to fit your present abilites, then work up from there.
Here is the link for more info on Hyponatremia.
http://www.medterms.com/script/main/art.asp?articlekey=3859&rd=1 I hope this of some help...good luck