Keep Active Minnesota

NCT ID: NCT00283452

Last Updated: 2010-03-10

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 1049 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2003-09-30
• Study Completion Date: 2009-09-30

Brief Summary

The purpose of this study is to determine whether a new phone and mail based coaching/support program that has been developed is more effective in helping people stay physically active than existing programs that are currently available to all HealthPartners members. We hypothesize that the intervention program will lead to a greater likelihood of physical activity maintenance among moderately active older adults than a usual care condition.

Detailed Description

The benefits of physical activity for adults are well established, but less than one-third of older adults in the U.S. have achieved recommended levels of physical activity despite widespread clinical recommendations to increase physical activity in recent years. Clinic-based approaches to increasing physical activity are expensive, difficult to implement in busy practice settings, and have limited reach. Moreover, evidence of the efficacy of such approaches is equivocal. A population based approach may be a more effective and less costly strategy to increase levels of physical activity in older adults. Population studies of physical activity have demonstrated that each year, many sedentary older adults initiate physical activity, but a nearly equal number of those who were active become sedentary. Among older adults initiating physical activity, only half continue to be active 3 months later.

We hypothesize that a population based approach that emphasizes physical activity maintenance can substantially increase physical activity levels in a defined populations of older adults. This hypothesis is tested in a 24-month randomized trial evaluating an innovative, theory-based behavioral intervention to maintain physical activity in a random sample of 50-70 year old adults who have recently become at least moderately active. One thousand (1000) subjects will be randomized to one of two experimental groups: 1) a "usual care" control group, and 2) an interactive phone- and mail-based intervention program tailored to maintaining physical activity in older adults. The primary outcome measures are: 1) physical activity, assessed as kcals/wk expenditure; and 2) physical activity maintenance, assessed as follow-up kcals/wk expenditure relative to baseline. Careful measurement of the penetration of the intervention into a well characterized older adult population, and the costs of the intervention, will be assessed. Psychosocial and behavioral mediators of physical activity maintenance will also be examined.

Study results will be relevant to policy makers, health promotion practitioners and health plans, and will provide practical information on the effectiveness, population penetration, and costs of an intervention designed to maximize population levels of physical activity among older adults.

Conditions

Physical Activity Maintenance

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Blinding Strategy: NONE

Study Groups

Intervention Group

Participation in phone/mail-based intervention to maintain physical activity.

Group Type: EXPERIMENTAL

Phone counseling with written materials

Intervention Type: BEHAVIORAL

Participation in phone/mail counseling to maintain physical activity

Control

No intervention; participation in surveys only

Group Type: NO_INTERVENTION

No interventions assigned to this group

Interventions

Phone counseling with written materials

Participation in phone/mail counseling to maintain physical activity

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

• Adults between the ages of 50 and 70;
• Have HealthPartners insurance for 11 out of the past 12 months;
• Engage in moderate physical activity for a total of 30 minutes at least two days per week;
• Have increased activity level in the past year.

Exclusion Criteria

• Modified Charlson scores >=3 (calculated using prior year diagnoses);
• Nonskin cancer;
• Congestive heart failure;
• Coronary heart disease;
• Psychotic Illness;
• Substance abuse;
• Terminal illness.

• Minimum Eligible Age: 50 Years
• Maximum Eligible Age: 70 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

National Institute on Aging (NIA)

NIH

Sponsor Role: collaborator

HealthPartners Institute

OTHER

Sponsor Role: lead

Responsible Party

HealthPartners Research Foundation

Principal Investigators

Brian C. Martinson, PhD

Role: PRINCIPAL_INVESTIGATOR

HealthPartners Institute

Locations

HealthPartners Research Foundation

Bloomington, Minnesota, United States

Countries

United States

References

Senso MM, Anderson CP, Crain AL, Sherwood NE, Martinson BC. Self-reported activity and accelerometry in 2 behavior-maintenance trials. Am J Health Behav. 2014 Mar;38(2):254-64. doi: 10.5993/AJHB.38.2.11.

Reference Type: DERIVED

PMID: 24629554 (View on PubMed)

Sherwood NE, Martinson BC, Crain AL, Hayes MG, Pronk NP, O'Connor PJ. A new approach to physical activity maintenance: rationale, design, and baseline data from the Keep Active Minnesota Trial. BMC Geriatr. 2008 Jul 25;8:17. doi: 10.1186/1471-2318-8-17.

Reference Type: DERIVED

PMID: 18655709 (View on PubMed)

Other Identifiers

1R01AG023410-01

Identifier Type: NIH

Identifier Source: secondary_id

View Link

03-024

Identifier Type: -

Identifier Source: org_study_id