Navigation Links
Study finds diet plus exercise is more effective for weight loss than either method alone
Date:4/14/2011

SEATTLE Everyone knows that eating a low-fat, low-calorie diet and getting regular exercise helps shed pounds, but a new study led by researchers at Fred Hutchinson Cancer Research Center has found that when it comes to losing weight and body fat, diet and exercise are most effective when done together as compared to either strategy alone.

The results of this randomized trial, led by Anne McTiernan, M.D., Ph.D., director of the Prevention Center and a member of the Hutchinson Center's Public Health Sciences Division, were published online April 14 in Obesity.

The majority of women in the study who both improved their diet and exercised regularly shed an average of nearly 11 percent of their starting weight, which exceeded the study's goal of a 10 percent or more reduction in body weight.

"We were surprised at how successful the women were," McTiernan said. "Even though this degree of weight loss may not bring an obese individual to a normal weight, losing even this modest amount of weight can bring health benefits such as a reduced risk of diabetes, heart disease and cancer."

The year-long intervention involved 439 overweight-to-obese, sedentary, postmenopausal Seattle-area women, ages 50 to 75, who were randomly assigned to one of four groups:

  • exercise only (goal: 45 minutes of moderate-to-vigorous aerobic exercise per day, five days a week, including three days at the Hutchison Center's exercise facility);
  • diet only (goal: 1,200 to 2,000 calories a day, depending on starting weight, and fewer than 30 percent of daily calories from fat);
  • exercise and diet (with the same goals as above); and
  • no intervention.

"Although numerous studies have examined the effect of lifestyle interventions on weight, few have focused on postmenopausal women, a group that experiences particularly high rates of overweight and obesity," McTiernan said.

At the end of the intervention, the researchers found that the women in the exercise-only group lost, on average, 2.4 percent of their starting weight (with a mean weight loss of 4.4 pounds) as compared to an average weight loss of 8.5 percent among women in the diet-only group (with a mean weight loss of 15.8 pounds). The greatest weight loss was achieved by women who both changed their diet and exercised regularly; these women shed an average of 10.8 percent of their starting weight (with a mean weight loss of 19.8 pounds). Two-thirds of the women in this group achieved the study goal of losing at least 10 percent of their starting weight.

Body-mass index (height-to-weight ratio), waist circumference and percentage of body fat were also significantly reduced among the three intervention groups. The women who were assigned to the nonintervention control group, who did not change their diet or activity level, on average lost less than a pound a statistically insignificant decrease.

"This study shows that you get the biggest bang for your buck by combining a healthy weight-loss diet which in this case meant reducing calories by cutting fat intake and boosting the consumption of low-calorie foods with regular, moderate-intensity aerobic exercise," McTiernan said. "You don't need to be an athlete; walking, biking or gym cardio machines all work well. Start slowly and gradually increase to 45 minutes of activity a day, more if you are able."

In addition to promoting weight loss and preventing weight gain over time, regular exercise helps with balance, strength and fitness. "This helps older people keep active overall, which has been shown to prolong a healthy life," McTiernan said.

The study also found that the women who lost the most weight and body fat kept a food journal, writing down everything they ate and drank with the exception of water and no-calorie drinks. Other strategies associated with the most successful weight loss included preparing meals at home and eating out less often at restaurants. "Doing your own cooking gives you the most control over calories," McTiernan said.

The combined diet-plus-exercise arm of the study followed the current nutrition and physical activity recommendations by the National Institutes of Health Obesity Education Initiative Expert Panel. "Our clinical trial supports these recommendations," McTiernan said.

Despite the overwhelming evidence for the benefits of lifestyle-induced weight loss, there are still major barriers to implementing these programs, the authors wrote. To this end, McTiernan and colleagues are conducting ongoing follow up of these study participants to try to determine factors both psychological and behavioral that are associated with long-term weight-loss maintenance. "Identifying factors that help women not only lose weight but keep it off long term will help steer the development and implementation of obesity-treatment programs that have the greatest promise to impact public health," she said.


'/>"/>

Contact: Kristen Woodward
kwoodwar@fhcrc.org
206-667-5095
Fred Hutchinson Cancer Research Center
Source:Eurekalert

Related medicine news :

1. Despite Treatment, Employees with Depression Generate Higher Absentee Costs, According to Thomson Reuters Study
2. American Council on Exercise (ACE) Study Reveals Kettlebells Provide Powerful Workout in Short Amount of Time
3. TV drama can be more persuasive than news program, study finds
4. Study carried out into biological risks of eating reptiles
5. Neuroimaging study may pave way for effective Alzheimers treatments
6. Study finds racial gaps continue in heart disease awareness
7. Luth Researchs IndicatorEDG(TM) Study Finds Americans Hopes of Achieving Their Dreams Are Fading
8. First blinded study of venous insufficiency prevalence in MS shows promising results
9. Soothing infants with food focus of childhood obesity study
10. People with anxiety disorder less able to regulate response to negative emotions, study shows
11. American Heart Association Rapid Access Journal Report: Study Finds Racial Gaps Continue in Heart Disease Awareness, Low Knowledge of Heart Attack Warning Signs Among Women
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... ... October 13, 2017 , ... As health professionals work to improve ... engagement.” The patient is doing more than filling out a survey; in many cases ... an increasing emphasis in health care and research on the importance of active engagement ...
(Date:10/13/2017)... ... October 13, 2017 , ... ... PharmD ‘17, and Jennifer Huggins, PharmD ’17, along with clinical associate professor ... prevention of cardiovascular diseases during the 15th Annual Women’s Health Conference. The ...
(Date:10/13/2017)... ... 2017 , ... Ellevate Network, the leading network for professional women, brought together ... equality at their inaugural Summit in New York City in June. The event was ... of over 3 million. To watch the Mobilize Women video, click here . ...
(Date:10/13/2017)... ... October 13, 2017 , ... “The Journey: From the Mountains to the ... save lost souls in the Philippines. “The Journey: From the Mountains to the Mission ... of the Bible. She has taught all ages and currently teaches a class of ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... the demand of today’s consumer and regulatory authorities worldwide. From Children’s to Adults ... tested to meet the highest standard. , These products are also: Gluten ...
Breaking Medicine News(10 mins):
(Date:10/2/2017)... Halo Labs announces the European launch of their new low volume, ... 2017 in Cambridge, U.K on October 4th. ... samples with unprecedented speed and sensitivity while using far less sample ... ... system ...
(Date:9/27/2017)... 27, 2017  Commended for their devotion to personalized service, ... as number one in the South Florida Business Journal,s 50 ... 5000 yearly list, the national specialty pharmacy has found its ... will soon be honored by SFBJ as the 2017 ... Set to receive his award in October, Bardisa said ...
(Date:9/23/2017)... Janssen Biotech, Inc. (Janssen) announced today that ... U.S. Food and Drug Administration (FDA) for the Biologics ... treatment of moderately to severely active rheumatoid arthritis (RA). ... needed to further evaluate the safety of sirukumab in ... "We are disappointed ...
Breaking Medicine Technology: