Dose/Response of Exercise on Long Term Weight Loss

Obesity Clinical Trial

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00006315
• Other study ID #: 923
• Secondary ID: R01HL064991
• Status: Completed
• Phase: N/A
• First received: September 28, 2000
• Last updated: May 12, 2016
• Start date: September 1999
• Est. completion date: August 2004

Study information

• Verified date: May 2005
• Source: National Heart, Lung, and Blood Institute (NHLBI)
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Federal Government
• Study type: Observational

Clinical Trial Summary

To examine the dose-response of exercise on long-term weight loss in overweight adult women.

Description:

BACKGROUND:

Exercise is a key component of behavioral weight loss programs because of its effect on weight loss, body composition, cardiovascular disease risk factors, and other obesity related diseases such as type 2 diabetes mellitus. Despite these benefits, it is unclear whether there is an optimal exercise duration and/or intensity that will enhance long-term weight loss. The current public health recommendation for physical activity is for individuals to participate in at least 30 minutes of moderate intensity physical activity on most days of the week (approximately 150 minutes per week total). However, it is unclear whether this amount of exercise is adequate for long-term weight loss. Moreover, cross-sectional studies have shown that individuals that have been successful at long-term weight loss participate in levels of physical activity that are greater than the current public health recommendations.

DESIGN NARRATIVE:

The researchers hypothesized that adopting higher levels of exercise duration and/or intensity, coupled with a strong behavioral intervention would enhance long-term weight loss. To test this hypothesis, they recruited 200 overweight women and randomly assigned them to one of four treatment groups: (1) moderate intensity, moderate 1000cal/wk duration exercise, (2) vigorous intensity moderate duration exercise, (3) moderate 2000cal/wk intensity, high duration exercise, and (4) vigorous intensity, high duration exercise. All subjects participated in a 24-month behavioral weight loss program, with subjects attending group meetings and receiving periodic telephone contacts from the weight loss program, with subjects attending group meetings and receiving periodic telephone contacts from the interventionists. In addition, to facilitate the adoption of the exercise protocols, all subjects were provided with a home treadmill. Assessment of body weight occured at 0, 6, 12, and 24 months and exercise participation was measured throughout the program. In addition, body composition, cardiorespiratory fitness, cardiovascular disease risk factors, and mediators of behavior change were measured at 0, 6, 12, and 24 months.

The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 0
• Est. completion date: August 2004
• Accepts healthy volunteers: No
• Gender: Female
• Age group: 25 Years to 45 Years
• Eligibility: No eligibility criteria

Study Design

N/A

Related Conditions & MeSH terms

• Cardiovascular Diseases
• Heart Diseases
• Obesity

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
National Heart, Lung, and Blood Institute (NHLBI)

References & Publications (5)

Gallagher KI, Jakicic JM, Kiel DP, Page ML, Ferguson ES, Marcus BH. Impact of weight-cycling history on bone density in obese women. Obes Res. 2002 Sep;10(9):896-902. — View Citation

Jakicic JM, Gallagher KI. Exercise considerations for the sedentary, overweight adult. Exerc Sport Sci Rev. 2003 Apr;31(2):91-5. — View Citation

Jakicic JM, Marcus BH, Gallagher KI, Napolitano M, Lang W. Effect of exercise duration and intensity on weight loss in overweight, sedentary women: a randomized trial. JAMA. 2003 Sep 10;290(10):1323-30. — View Citation

Jakicic JM, Wing RR, Winters-Hart C. Relationship of physical activity to eating behaviors and weight loss in women. Med Sci Sports Exerc. 2002 Oct;34(10):1653-9. — View Citation

Jakicic JM. The role of physical activity in prevention and treatment of body weight gain in adults. J Nutr. 2002 Dec;132(12):3826S-3829S. — View Citation