People with type 1 diabetes need daily injections to help them absorb glucose to use as fuel. Failure to take correct doses can lead to rapid weight loss.

Charity Diabetes UK estimates that up to one-third of young women with the disease miss injections to stay thin.

Doctors warn that the "diabulimia" eating disorder can lead to blindness, heart and kidney disease.

US doctors recently went public on their concerns about the practice.

The researchers identified 560 people who were diagnosed with dementia between 1990 and 1994. They then found a group of people of similar age who did not have dementia.

They looked back at the weight of all of the patients over the preceding 30 years.

Among the women in the study, those who later developed dementia started off at the same weight as those who did not develop dementia, but then their weight drifted downward by a few pounds 10 years before the developed any dementia symptoms.

The weight of these women also went downward a few more pounds when the memory loss first manifested.

Most people know part of Fogle's story, he said, but don’t realize he started gaining weight in third grade. "I can trace it back to when I was given the best birthday present of my life: a Nintendo."

At that point, Fogle said, he started playing video games more and riding his bike and playing sports less. He became sedentary. With his love of video games, he developed a love of junk food.

"I usually had one hand on the controller and one in a bag of chips," he said. By the time he reached sixth grade, he was bigger than the other children, he said, and his father, a doctor, started to worry.

"They tried restricting my Nintendo time, but I found ways to get around it," Fogle said.

The debut issue of Get Active magazine includes features on the life-enhancing powers of exercise, how to begin an exercise regimen, how fitness can boost your finances, how to flex your political muscle, and an interview with Catherine Oxenberg and Casper Van Dien, stars of the Lifetime television reality series, I Married a Princess. In addition, the magazine will provide tips on training, nutrition, gear, and choosing a personal trainer. Every edition of Get Active magazine will also consist of feature stories covering a variety of topics and the magazine will tell the personal stories of health club members who have achieved positive results in their fitness routines.

"There's so much fluctuation in body weight due to fluid that you lose or gain, and that can represent two, three, sometimes four pounds," notes Harry DuVal, Ph.D., associate professor of exercise science and director of the fitness center at the University of Georgia in Athens. "You get all excited, thinking, 'Look what I lost!' and then you go and replenish your fluids and, bingo, you're right back up to where you were -- if not higher -- so you get discouraged."

The scale can also be inaccurate, particularly if you're strength training, because of the change in your muscle mass.

Of course, you've probably heard a million times that muscle weighs more than fat -- but just how much does that affect the number on the scale? "If you're doing a vigorous form of resistance training at any age, you can gain lean muscle mass," says DuVal. "And it takes very little gain in muscle mass to equate to pounds gained. You can still be losing significant body fat, but if you're gaining just a little bit of lean muscle mass, it doesn't show up as a loss on the scale."

Just when we thought we couldn't get any fatter, a new study that followed Americans for three decades suggests that over the long haul, 9 out of 10 men and 7 out of 10 women will become overweight.

Even if you are one of the lucky few who made it to middle age without getting fat, don't congratulate yourself -- keep watching that waistline.

Half of the men and women in the study who had made it well into adulthood without a weight problem ultimately became overweight. A third of those women and a quarter of the men became obese.