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Working Women Walking Program: A Sequential Multiple Assignment Randomized Trial.

Susan W Buchholz1, Manju Daniel2, Spyros Kitsiou3

  • 1College of Nursing, Michigan State University, East Lansing, MI, USA.

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|May 6, 2025
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Summary
This summary is machine-generated.

Fitbit use and goal setting showed some benefit in improving physical activity for women. Other interventions like text messages, calls, and meetings did not significantly increase activity levels.

Keywords:
SMARTadaptive interventionsphysical activitywearable

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Area of Science:

  • Behavioral Science
  • Public Health
  • Exercise Science

Background:

  • Physical activity interventions show promise for women's health.
  • Combining multiple interventions may enhance efficacy.
  • Identifying optimal adaptive strategies is crucial for sustained behavior change.

Purpose of the Study:

  • To determine the most effective adaptive intervention for improving physical activity in women.
  • To compare the efficacy of Fitbit, text messages, personal calls, and group meetings.
  • To evaluate an adaptive intervention using a Sequential Multiple Assignment Randomized Trial (SMART) design.

Main Methods:

  • Employed a SMART design with initial, augmented, and maintenance phases.
  • Recruited low-active women aged 18-70.
  • Randomized participants to Fitbit or Fitbit + text messages, with subsequent rerandomization for non-responders.

Main Results:

  • No significant differences in steps or moderate/vigorous physical activity (MVPA) between initial treatments.
  • No significant differences in steps or MVPA between augmented treatments for non-responders.
  • Significant sustained increases in daily steps and MVPA observed at 8, 34, and 50 weeks.

Conclusions:

  • Text messages, personal calls, and group meetings did not independently increase physical activity.
  • Fitbit use, combined with consistent goal setting, demonstrated a beneficial effect on physical activity.
  • Adaptive intervention components beyond basic Fitbit use and goal setting did not yield additional benefits.