When you have a lot of weight to lose, it can be hard to work out. Not only is it physically uncomfortable, but there are often emotional challenges. Researchers at Temple's Center for Obesity Research and Education studied data from 278 obese and normal-weight women, and found that the obese women were more likely to say they were self-conscious, afraid of injury, daunted by the effort, and to report minor aches and pains. And they were less likely to be exercising a year later.