Physical Activity and Sedentary Behavior Change; Impact on Lifestyle

"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."

"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."

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.