Many people find it hard to continue losing weight for various reasons. The article below helps explain a few of the reason why our bodies might be working against us through our appetite and the way we feel when losing weight. It also gives some useful tips on how to deal with them.
http://www.shape.com/weight-loss/weight-loss-strategies/losing-weight-and-not-feeling-great-why-you-may-feel-lousy-you-lo
 
    Though we've always known exercise can help one's depression because of hormones released during and after activity, exercise can truly improve symptoms of the clinically depressed along with antidepressant drugs. Below is one of many articles on the subject: http://www.shape.com/lifestyle/mind-and-body/exercise-powerful-enough-act-second-antidepressant-drug