THERE IS NO SINGLE BEST STRATEGY, given the lack of data from rigorous comparison studies. There are, however, several interventions for adults that are effective. They include:
- writing a patient-specific behavioral health "green" prescription
- encouraging patients to join forces with accountability partners or support groups
- recommending the use of pedometers (strength of recommendation [SOR]: A, meta-analyses).
In children and adolescents, multicomponent strategies that include school-based interventions combined with either family or community involvement increase physical activity (SOR: A, systematic review).
Evidence summary
The Healthy People 2010 report calls for increasing the proportion of Americans who engage in moderate physical activity (activities that use large muscle groups and are at least equivalent to brisk walking) from 15% to 30%.1 The report doesn’t describe how best to achieve this objective.
Systematic review reveals approaches worth trying
The US Department of Health and Human Services (DHHS) and the Centers for Disease Control and Prevention (CDC) conducted a systematic review of 94 qualifying trials and assigned interventions to 1 of 3 approaches: “information based,” “behavioral and social,” and “facilities and activities.”2
Behavioral and social interventions have the best data support.2 Within this category, strong evidence backed school-based physical education and accountability partners or exercise support groups. School-based physical education resulted in a median net increase in physical activity time of 50.3% (range 6.0%-125.3%); accountability partners or support groups produced a mean net increase of 44.2% (interquartile range 19.9%-45.6%).
“Green” prescriptions are primary care behavioral interventions that include measurable goals, self-reward, structured problem-solving, social network reinforcement, and relapse prevention counseling. In the DHHS review, 10 trials studied green prescriptions; the median net increase in physical activity time was 35.4% (interquartile range 16.7%-83.3%).2 A trial in 42 rural and urban New Zealand general practices that added 3 telephone follow-up sessions to the green prescription showed a 10% increase in achieving 150 minutes of vigorous exercise weekly among green prescription participants compared with controls (number needed to treat=10).3