Many people can drop pounds quickly in the early phases of a diet, but studies have found that it is difficult to keep the weight off in the long term. For post-menopausal women, natural declines in energy expenditure could make long-term weight loss even more challenging.
A new study finds that in post-menopausal women, some behaviors that are related to weight loss in the short term are not effective or sustainable for the long term. Interventions targeting these behaviors could improve long-term obesity treatment outcomes. The research is published in the September issue of Journal of the Academy of Nutrition and Dietetics.
Lead investigator Bethany Barone Gibbs, PhD, University of Pittsburgh Department of Health and Physical Activity, explains that a number of factors work against long-term weight loss. "Not only does motivation decrease after you start losing weight, there are physiological changes, including a decreased resting metabolic rate. Appetite-related hormones increase. Researchers studying the brain are now finding that you have enhanced rewards and increased motivation to eat when you've lost weight." Combined with the natural energy expenditure decline in women following menopause, it is extremely difficult for older women to lose weight and maintain weight loss.
Traditional behavioral treatments for obesity, focused on caloric intake, have had poor long-term results. The investigators sought to determine if changes in eating behaviors and selected foods were associated with weight loss at six and 48 months in a group of overweight post-menopausal women. A total of 508 women were randomized to either a Lifestyle Change group or a Health Education group. The Lifestyle Change group met regularly with nutritionists, exercise physiologists, and psychologists throughout the study. Their goals were to reduce fats and caloric intake, increase consumption of fruit, vegetables, and whole grains, and participate in regular moderate exercise. The Health Education Group was offered seminars by health professionals on general women's health, but not specifically weight loss.
Investigators found that the eating behaviors associated with weight loss at six months were eating fewer desserts and fried foods, drinking fewer sugar-sweetened beverages, eating more fish, and eating at restaurants less. After four years, they found that eating fewer deserts and drinking fewer sugar-sweetened beverages continued to be associated with weight loss or maintenance. Eating fewer desserts and drinking fewer sugar-sweetened beverages were also related to long-term weight loss. However, eating more fruits and vegetables and less meat and cheese emerged as additional important predictors for long-term weight loss. Eating at restaurants declined at 48 months whether or not subjects lost weight. Dr. Barone Gibbs speculates that this may have been related to economic factors and not relevant to the study.
Dr. Barone Gibbs explains that strategies such as eating fewer fried foods may not be sustainable for the long term. "People are so motivated when they start a weight loss program. You can say, 'I'm never going to eat another piece of pie,' and you see the pounds coming off. Eating fruits and vegetables may not make as big a difference in your caloric intake. But that small change can build up and give you a better long-term result, because it's not as hard to do as giving up French fries forever."
The results suggest that decreased consumption of desserts and sugar-sweetened beverages consistently associate with short- and long-term weight loss or maintenance, but increased fruits and vegetables and decreased meat and cheeses are additional factors that may improve long-term weight loss or control. "If the goal is to reduce the burden of obesity, the focus must be on long-term strategies because changes in eating behaviors only associated with short-term weight loss are likely to be ineffective and unsustainable," concludes Dr. Barone Gibbs.
In an audio podcast accompanying the study, Dr. Barone Gibbs discusses the results in depth, including its implications for men and women of all ages and the challenges of self-reporting in research on diets and eating behaviors.
Eileen Leahy | EurekAlert!
A promising target for kidney fibrosis
21.04.2017 | Brigham and Women's Hospital
Stem cell transplants: activating signal paths may protect from graft-versus-host disease
20.04.2017 | Technische Universität München
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
24.04.2017 | Physics and Astronomy
24.04.2017 | Materials Sciences
24.04.2017 | Life Sciences