Everyone has talked veggies and calories, which I agree with, so I 'll bring up the water. THe standard for determing how much water to drink is to drink half your weight in ounces of water so at 336 you should be trying to get in 168 oz. YIKES! you say and I'll agree! I am drinking between 140-160oz per day and, yes, some days I feel like I am floating! But I also feel much better when I am drinking that much, esp. my joints.

Hope that helps and enjoy your swimming-I'm jealous!

Connie