Current exercise recommendations may not be sufficient for overweight women to sustain weight loss

Jul 28, 2008

In addition to limiting calories, overweight and obese women may need to exercise 55 minutes a day for five days per week to sustain a weight loss of 10 percent over two years, according to a report in the July 28 issue of Archives of Internal Medicine.

More than 65 percent of U.S. adults are overweight, a public health concern, according to background information in the article. "Among obese adults, long-term weight loss and prevention of weight regain have been less than desired," the authors write. "Therefore, there is a need for more effective interventions."

Current recommendations prescribe 30 minutes of moderate physical activity on most days of the week, for a total of 150 minutes per week. However, a growing consensus suggests that more exercise may be needed to enhance long-term weight loss.

To calculate the amount of exercise needed, John M. Jakicic, Ph.D., of the University of Pittsburgh, and colleagues enrolled 201 overweight and obese women in a weight loss intervention between 1999 and 2003. All the women were told to eat between 1,200 and 1,500 calories per day. They were then assigned to one of four groups based on physical activity amount (burning 1,000 calories vs. 2,000 calories per week) and intensity (moderate vs. vigorous). Group meetings focusing on strategies for modifying eating and exercise habits, as well telephone calls with the intervention team, also were conducted over the two-year period.

After six months, women in all four groups had lost an average of 8 percent to 10 percent of their initial body weight. However, most were not able to sustain this weight loss. After two years the women's weight was an average of 5 percent lower than their initial weight, with no difference between groups.

The 24.6 percent of individuals who did maintain a loss of 10 percent or more over two years reported performing more physical activity (an average of 1,835 calories per week, or 275 minutes per week over the baseline level of activity) than those who lost less weight. They also completed more telephone calls with the intervention team, engaged in more eating behaviors recommended for weight control and had a lower intake of dietary fat.

Source: JAMA and Archives Journals

Explore further: A new approach to cut death toll of young people in road accidents

add to favorites email to friend print save as pdf

Related Stories

Power arm band for wearables harvests body heat

Apr 12, 2014

(Phys.org) —A group of Korean researchers have turned their focus on supplying a reliable, efficient power source for wearables. Professor Byung Jin Cho of the Korea Advanced Institute of Science and Technology ...

Carbon nanotube fibers outperform copper

Feb 14, 2014

(Phys.org) —On a pound-per-pound basis, carbon nanotube-based fibers invented at Rice University have greater capacity to carry electrical current than copper cables of the same mass, according to new research.

New automatic welding system makes car production cheaper

Nov 05, 2013

European researchers have found a way make the automotive sector more eco-friendly, while at the same time cutting production costs. The EU-funded project SMARTDRESS ('Adaptive tip dress control for automated ...

Recommended for you

Sensors may keep hospitalized patients from falling

7 hours ago

(Medical Xpress)—To keep hospitalized patients safer, University of Arizona researchers are working on new technology that involves a small, wearable sensor that measures a patient's activity, heart rate, ...

Rising role seen for health education specialists

9 hours ago

(HealthDay)—A health education specialist can help family practices implement quality improvement projects with limited additional financial resources, according to an article published in the March/April ...

User comments : 0

More news stories

Genetic code of the deadly tsetse fly unraveled

Mining the genome of the disease-transmitting tsetse fly, researchers have revealed the genetic adaptions that allow it to have such unique biology and transmit disease to both humans and animals.

Ocean microbes display remarkable genetic diversity

The smallest, most abundant marine microbe, Prochlorococcus, is a photosynthetic bacteria species essential to the marine ecosystem. An estimated billion billion billion of the single-cell creatures live i ...