Physical Inactivity
Conditions
Keywords
Physical activity, Exercise, Self-pacing
Brief summary
We will randomly assign (blocked on Gender (female, male, other), body mass index (BMI; overweight \[25 \< BMI \< 30\]) or obese (30 \< BMI \<40) and pain status (chronic pain vs not)) adults ages 50-64 into either; (a) self-selected intensity (i.e., SELF-PACED) or (b) prescribed moderate intensity (i.e., PRESCRIBED) conditions. Prior to randomization, persons responding to our ads will participate in the following: (1) telephone screening with the study research assistant (RA) to establish eligibility; (2) an orientation session to obtain more information about the study; and, after providing informed consent (3) baseline assessment and screening (bodyweight, maximal fitness test, dietary intake, and questionnaires to assess potential covariates). Prior to randomization, the RA will give participants an accelerometer to assess baseline physical activity (PA) behavior over a one-week period. Participants will then be randomized to one of the two study conditions. Following randomization, all participants will receive our theory-based PA promotion intervention to help them overcome barriers to regular PA. All participants will be given chest strap heart rate (HR) monitors and instructions on wrist palpation. Follow-up assessments will consist of accelerometry for one-week periods at months 3, 6, 9, and 12, ecological momentary assessment (EMA) throughout the 12 months and bodyweight at 3-month intervals.
Interventions
BEHAVIORALSelf-Paced Intensity Physical Activity
Participants are given a prescription to engage in 150-300 minutes per week of structured exercise with an emphasis on walking. For this study arm, participants are given the explicit recommendation to engage in self-selected intensity PA.
BEHAVIORALPrescribed Moderate Intensity Physical Activity
Participants are given a prescription to engage in 150-300 minutes per week of structured exercise with an emphasis on walking. For this study arm, participants are given the explicit recommendation to engage in moderate intensity PA consistent with national guidelines.
Sponsors
Brown University
National Institute on Aging (NIA)
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
50 Years to 64 Years
Healthy volunteers
Yes
Inclusion criteria
* ages 50-64 * BMI 25-40 * Sedentary or low-active, defined as participating in \< 60 min/week of structured exercise * Has a smart phone that can connect to the internet at least once every few days and is compatible with smartphone app
Exclusion criteria
* Medical symptoms/conditions that may make unsupervised exercise unsafe (specific
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in total volume of structured PA | Measured at baseline, and months 3, 6, 9, and 12. | Minutes of PA weighted by intensity, expressed in metabolic equivalent (MET) minutes as determined by accelerometers (Actigraph \[model wGT3x-BT\]) worn during one-week periods. |
| Minutes per week of PA | Measured daily from date of randomization for 52 weeks based on participant initiation of exercise | Participants will be instructed to indicate, in real time, each time they begin and end a PA session via EMA. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Changes in Body Weight | Measured at baseline, and months 3, 6, 9, and 12. | Assessment of self-reported body weight by study-provided scales |
Countries
United States
Contacts
PRINCIPAL_INVESTIGATORDavid M Williams, Ph.D.
Brown University School of Public Health
Outcome results
None listed