NEW YORK - Excessive exercise
is one of the general warning signs of an eating disorder, but the problem may
be particularly common among anorexic women who vomit or use laxatives to lose
weight, a study shows.
Women such as these may be at particular risk of dangerously low weight and
potentially fatal consequences, according to the study authors. Targeting the
anxiety and obsessive tendencies so common in these women might aid in treating
the eating disorder, they report in the International Journal of Eating
Disorders.
Doctors have known that excessive exercise is a common feature of eating
disorders like anorexia and bulimia, but it hasn't been clear which women are
most likely to have the problem.
For the current study, researchers led by Dr. Cynthia M. Bulik of the
University of North Carolina-Chapel Hill used data from three international
studies of women with anorexia, bulimia or both.
The women completed standard questionnaires on eating disorder symptoms,
personality traits and exercise habits. Excessive exercise was defined as
exercising more than 3 hours a day or being otherwise obsessed with daily
physical activity - letting it interfere with other aspects of life, for
example, or exercising even when injured or ill.
Although excessive exercise was common regardless of the type of eating
disorder, the study found, it was most common among anorexic women who purged.
Of these 336 women, more than half exercised excessively.
Women with high levels of anxiety, obsessiveness and perfectionism were also
particularly likely to exercise to an extreme degree, the study found. Such
personality traits are common among anorexics who purge to control their weight.
It makes sense that these women would be particularly likely to "use all
available methods in their drive for thinness and control," according to Bulik.
The findings could aid in treatment, she told Reuters Health, by helping
doctors know which eating disorder patients need to be more extensively screened
for extreme exercise habits.
"Clinically," she explained, "we know that when we send people back home and
they have a strong drive to exercise that it can negatively impact on their
ability to maintain the weight that they worked so hard to gain in hospital."
Excessive exercise is a symptom that "requires more vigilance and
understanding," Bulik said, so that patients can be taught how to include
healthy exercise levels in their lives, without losing any gains they've made in
controlling the eating disorder.
