re: "after an hour of PT and resistance training, 2 miles of walking and 45 minutes of swimming, my leg just sort of wore out"

this sounds like too much in one day or without enough recovery time between activities. in addition, what was going on with your nutrition during all this? adequate carbs? maybe not!

about the swimming - that's awesome! I've been swimming for just over a year and I finally feel like I do a proper job of it. however I know I'm doing it for body transformation and not because I want to compete. my arms are too big and heavy. this is by choice through my weight training. I love what swimming has done for my body this past year. it compliments the pushups and pullups very nicely.

controlling my diet is my biggest challenge right now.