@joekelly Nice of you to assume the best, but I am rather young and rather out of shape, as shorty pointed out. I have been improving, but I do feel that a little exercise will help, in addition to some other things.
@behing19 Great advice about the sandwich. That makes a lot of sense, and seems to be consistent with my issues and food intake- I am going to try to spread out the food through my round, so that I don't crash between the time I feel hungry and the time the food starts kicking in again. Excellent advice. I also appreciate the thoughts about building up some endurance.
@clubchamp Excellent comment on mental endurance. I've done a lot of research on the mental aspect of golf, and its a well-known fact that a golfer can't be in deep analytical thought through an entire round of golf. It's just too much. I've been working on trying to focus my heavy thinking to immediately before and after a swing. And then in between holes or driving/walking to my ball, just enjoying the scenery and joking around with the group. Definitely something I wrestle with.