Doctors say obesity,also known as severe overweight,is a complex condition.A doctor may advise medical interventions in addition to changes in behavior.But experts say the more successful weightloss plans include a wellbalanced diet and exercise. 

People who want to avoid weight gain have to balance the number of calories they eat with the number of calories they use.To lose weight,you can reduce the number of calories you take in,or increase the number you use,or both.Experts at the National Institutes of Health say to lose weight,a person should do some moderate or intensive physical exercise most days of the week.This could include fast walking,sports or strength training. 

A recent study looked at four of the most popular dieting plans in the United States.Researchers at Stanford University studied more than three hundred overweight women,mostly in their thirties or forties.Each woman went on one of the four plans:Atkins,The Zone,Ornish or LEARN.The women attended diet classes and received written information about the food plans.At the end of a year,the women on the Atkins diet had lost the most,more than four and a half kilograms on average. 

Christopher Gardner led the study,reported in the Journal of the American Medical Association. He said the Atkins diet may be more successful because of its simple message to lower the intake of sugar.Also,he said the advice to increase protein in the diet leads to more satisfying meals. 

But last week,another report suggested that only a small minority of people have longterm success in dieting.Researchers at the University of California found that most dieters regained their lost weight within five years.And often they gained back even more.But those who kept the weight off generally were the ones who exercised.
how many people were in the study?
were they both male and female?
what gender were they?
what was it about?
less than 10 of them?
exactly how many?
were they named?
what was one?
another?
where was it conducted?
by who?
from where?
who was the leader?
were the results published?
where?
was one plan more successful?
which one?
why?
which is?
any other reason?
what?
more than three hundred
studied more than three hundred
No
studied more than three hundred overweight women
female
studied more than three hundred overweight women
dieting plans
study looked at four of the most popular dieting plans
Yes
study looked at four of the most popular dieting plans
four
A recent study looked at four of the most popular dieting plans
Yes
four plans:Atkins,The Zone,Ornish or LEARN
Atkins
one of the four plans:Atkins
The Zone
one of the four plans:Atkins,The Zone
the United States
study looked at four of the most popular dieting plans in the United States
Researchers
study looked at four of the most popular dieting plans in the United States.Researchers
Stanford University
Researchers at Stanford University
Christopher Gardner
Christopher Gardner led the study
Yes
the study,reported in the Journal of the American Medical Association
the Journal of the American Medical Association.
the study,reported in the Journal of the American Medical Association.
Yes
the Atkins diet may be more successful
the Atkins diet
 the Atkins diet may be more successful 
because of its simple message
the Atkins diet may be more successful because of its simple message
to lower the intake of sugar.
 its simple message to lower the intake of sugar.
Yes
Also,he said the advice to increase protein in the diet leads to more satisfying meals. 
to increase protein in the diet leads to more satisfying meals.
Also,he said the advice to increase protein in the diet leads to more satisfying meals. 