Everyone knows that constantly losing and gaining weight is catastrophic for the figure.  It's called the yo-yo effect, frustration leads to bingeing and before long, your body doesn't know where it is.  How many of us know the familiar cycles of jubiliation because we've lost a few pounds, which quickly turns sour when we realise a few months later than we've put double back on.  Read on to find out how to get out of the yo-yo trap!