Maintaining Physical Activity in Older Adult MCO Members

Summary

Principal Investigator: B C Martinson
Abstract: 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 amon 9 older adults.
Funding Period: 2003-09-30 - 2009-08-31
more information: NIH RePORT

Top Publications

  1. pmc A new approach to physical activity maintenance: rationale, design, and baseline data from the Keep Active Minnesota Trial
    Nancy E Sherwood
    HealthPartners Research Foundation, Minneapolis, MN, USA
    BMC Geriatr 8:17. 2008
  2. pmc Maintaining physical activity among older adults: six-month outcomes of the Keep Active Minnesota randomized controlled trial
    Brian C Martinson
    HealthPartners Research Foundation, Mail Stop 21111R, P O Box 1524, Minneapolis, MN 55440 1524, USA
    Prev Med 46:111-9. 2008
  3. pmc The long and winding road to physical activity maintenance
    A Lauren Crain
    HealthPartners Research Foundation, Minneapolis, MN 55440 1524, USA
    Am J Health Behav 34:764-75. 2010
  4. pmc Maintaining physical activity among older adults: 24-month outcomes of the Keep Active Minnesota randomized controlled trial
    Brian C Martinson
    HealthPartners Research Foundation, Minneapolis, MN 55440 1524, USA
    Prev Med 51:37-44. 2010
  5. pmc Population reach and recruitment bias in a maintenance RCT in physically active older adults
    Brian C Martinson
    HealthPartners Research Foundation, Minneapolis, MN, USA
    J Phys Act Health 7:127-35. 2010
  6. pmc Self-reported activity and accelerometry in 2 behavior-maintenance trials
    Meghan M Senso
    HealthPartners Institute for Education and Research, Minneapolis, MN, USA
    Am J Health Behav 38:254-64. 2014

Detail Information

Publications6

  1. pmc A new approach to physical activity maintenance: rationale, design, and baseline data from the Keep Active Minnesota Trial
    Nancy E Sherwood
    HealthPartners Research Foundation, Minneapolis, MN, USA
    BMC Geriatr 8:17. 2008
    ....
  2. pmc Maintaining physical activity among older adults: six-month outcomes of the Keep Active Minnesota randomized controlled trial
    Brian C Martinson
    HealthPartners Research Foundation, Mail Stop 21111R, P O Box 1524, Minneapolis, MN 55440 1524, USA
    Prev Med 46:111-9. 2008
    ..We evaluate the 6-month efficacy of Keep Active Minnesota, a phone- and mail-based physical activity maintenance intervention designed for use with adults age 50 to 70 years who have increased their physical activity within the past year...
  3. pmc The long and winding road to physical activity maintenance
    A Lauren Crain
    HealthPartners Research Foundation, Minneapolis, MN 55440 1524, USA
    Am J Health Behav 34:764-75. 2010
    ..To build upon state-of-the-art theory and empirical data to estimate the strength of multiple mediators of the efficacious Keep Active Minnesota (KAM) physical activity (PA) maintenance intervention...
  4. pmc Maintaining physical activity among older adults: 24-month outcomes of the Keep Active Minnesota randomized controlled trial
    Brian C Martinson
    HealthPartners Research Foundation, Minneapolis, MN 55440 1524, USA
    Prev Med 51:37-44. 2010
    ..To evaluate the efficacy at 6-, 12-, and 24-month follow-up of Keep Active Minnesota (KAM), a telephone and mail-based intervention designed to promote physical activity (PA) maintenance among currently active adults age 50 to 70...
  5. pmc Population reach and recruitment bias in a maintenance RCT in physically active older adults
    Brian C Martinson
    HealthPartners Research Foundation, Minneapolis, MN, USA
    J Phys Act Health 7:127-35. 2010
    ....
  6. pmc Self-reported activity and accelerometry in 2 behavior-maintenance trials
    Meghan M Senso
    HealthPartners Institute for Education and Research, Minneapolis, MN, USA
    Am J Health Behav 38:254-64. 2014
    ..To compare between accelerometry (MVPA-A) and self-reported activity (MVPA-SR) in activity-maintenance (Keep Active Minnesota; KAM) and weight loss-maintenance (Keep It Off; KIO) trials...