Losing 100 pounds is no easy feat, but though the hard work may be in the weight loss, the real test comes in keeping the weight off. When the University of Kentucky reviewed the statistics of men and women who lost at least 100 pounds through their weight loss program over a nine-year period, they found out a few interesting things.

Over the course of the next 5 years, participants gained back some of the weight, but managed to keep at least half of it off. They also lowered their LDL cholesterol by 20%, their blood fat levels by 36%, and their blood sugar levels by 17%. Health experts say that these significant internal changes probably lowered their risk of heart disease by 50%, a significant change.

Those who have successfully lost the weight will tell you that weight loss is only half the battle. That's why programs that encourage lifestyle changes rather than fad diets, though slower, leave dieters better off in the long run.