Physical Activity and Sedentary Behavior Change; Impact on Lifestyle

Summary

Diabetes Prevention Program translational efforts, such as the Group Lifestyle Balance Program (GLB), have been shown to be effective in reducing weight and modifying diabetes and CVD risk factors in a variety of diverse community settings. Although one of the two primary goals of these DPP translation programs focuses on increasing physical activity levels, few published DPP translation studies reported results on change in physical activity with only one study reporting activity levels from an objective measurement instrument. In order to completely understand the role that physical activity plays in making healthy lifestyle change, it is critical that we validate the impact of activity using a valid and reliable objective measure. In addition, current studies suggest that decreasing time spent sitting may have a positive health impact separate from the effects of participating in planned bouts of moderate intensity activity. Therefore, we propose to examine the impact of a modified version of the GLB program, which will focus on decreasing sedentary/sitting behaviors. The results of this project will provide information regarding best options for physical activity within lifestyle intervention programs, focusing both on verifying the current role of physical activity in lifestyle intervention using an objective measure and on examining an alternative intervention option for translation efforts.

Conditions

• Sedentary Lifestyle
• Physical Activity

Interventions

BEHAVIORAL

Physical Activity Increase (GLB-MOD)

The Group Lifestyle Balance (GLB) program was adapted from the original DPP lifestyle intervention. As in the original DPP lifestyle program, the GLB goals are to achieve and maintain a 7% weight loss, and to safely and progressively increase physical activity to 150 minutes/week of moderately intense physical activity similar to a brisk walk. The curriculum will be administered in intervention groups with an average of 10-15 individuals per group; sessions will be conducted by trained coaches, with participants attending 22 sessions over one year. The two intervention arms will only differ in the aerobic activity portion of the intervention, which is covered in sessions #4, #10 and 19 as well as participant record keeping and goal setting in regards to activity/inactivity progression.

BEHAVIORAL

Sedentary Time Decrease (GLB-SED)

As in the original DPP, the GLB goal for weight is to achieve and maintain a 7% weight loss. For this intervention arm, instead of focusing on increasing moderate physical activity, the GLB curriculum will be adapted to address decreasing sitting time. Participants will have a goal of decreasing sitting time by 45 minutes/day. The curriculum will be administered in intervention groups with an average of 10-15 individuals per group; sessions will be conducted by trained coaches, with participants attending 22 sessions over one year. The two intervention arms will only differ in the aerobic activity portion of the intervention, which is covered in sessions #4, #10 and 19 as well as participant record keeping and goal setting in regards to activity/inactivity progression.

OTHER

6-month delayed (DELAYED)

Individuals assigned to 6 month delay will wait for 6 months from baseline to be randomly assigned to one of the two interventions and will begin intervention at that time. During the waiting period they will receive health information newsletters.

Sponsors & Collaborators

• National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

  collaborator NIH

• University of Pittsburgh

  lead OTHER

Principal Investigators

• Andrea M Kriska, PhD · University of Pittsburgh

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

40 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2015-09-30

Primary Completion

2019-07-31

Completion

2019-11-30

Countries

• United States

Study Locations