My personal feeling is that you're not eating enough calories. Do you eat more on the days you exercise? On a very rough calculation (not knowing your age and normal activity level sans exercise), even at your GOAL weight of 180, you would need to eat about 2,000-2,100 calories per day. I suspect you've got your body going into starvation mode right now and it just can't support the exercise load.
The protein point is a good one too. In your shoes, I would increase calories up to about 2,000 for a few days to see what happens, and increase both the fat and protein levels. You don't mention what "exercise" you do, duration, etc. You should at least try to calculate your calories burned on exercise days and make some accommodation. Also, if you're doing a LOT of exercise, in addition to putting your body into starvation mode, you might also just be over-trained right now. Consider backing down on the intensity and possibly take a couple days off in a row (combined with some more calories) until you feel a bit more spring to your step. Whether it's calories, over-training, or both, having your body poop out on you in the middle of a workout that used to be ok is a warning!
|