Don't let water retention kill your six-pack potential.
You’ve been working hard, killing your ab workouts, and sticking to your meal plan to reduce that pesky body fat. You’ve even skipped those late night food runs with your buddies, but your abs still aren’t showing. What gives? It could be that your body is holding water. That’s right, subcutaneous fluid stored in your cells, causing your skin to have a puffy, inflated look, and ultimately covering any muscle definition you may have earned.
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http://www.muscleandfitness.com/nutrition/lose-fat/9-ways-cut-water-weight-and-reveal-your-abs