At your height and weight 1600 calories barely keeps your body going if you were sedentary, and would not be enough to fuel the amount of exercise you do. You body might now be doing its best at conserving energy because it doesn't have enough fuel.
Last edited by goldfinch; 12-10-2011 at 05:16 PM.
Trek Madone 4.7 WSD
Cannondale Quick4
1969 Schwinn Collegiate, original owner
Terry Classic
Richard Feynman: “The first principle is that you must not fool yourself and you are the easiest person to fool.”