MobileMums: a randomized controlled trial of an SMS-based physical activity intervention

Ann Behav Med. 2010 May;39(2):101-11. doi: 10.1007/s12160-010-9170-z.


Background: Postnatal women (<12 months postpartum) are at increased risk of physical inactivity.

Purpose: To evaluate the efficacy and feasibility of a theory-based physical activity (PA) intervention delivered to postnatal women primarily via mobile telephone short message service (SMS).

Methods: Eighty-eight women were randomized to the intervention (n = 45) or minimal contact control (n = 43) condition. The 12-week intervention consisted of a face-to-face PA goal-setting consultation, a goal-setting magnet, three to five personally tailored SMS/week and a nominated support person who received two SMS per week. SMS content targeted constructs of social cognitive theory. Frequency (days/week) and duration (min/week) of PA participation and walking for exercise were assessed via self-report at baseline, 6 and 13 weeks.

Results: Intervention participants increased PA frequency by 1.82 days/week (SE +/- 0.18) by 13 weeks (F ((2,85)) = 4.46, p = 0.038) and walking for exercise frequency by 1.08 days/week (SE +/- 0.24) by 13 weeks (F ((2,85)) = 5.38, p = 0.02). Positive trends were observed for duration (min/week) of PA and walking for exercise.

Conclusions: Intervention exposure resulted in increased frequency of PA and walking for exercise in postnatal women.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Counseling / methods*
  • Electronic Mail*
  • Feasibility Studies
  • Female
  • Health Promotion / methods*
  • Humans
  • Motor Activity
  • Physical Fitness / psychology*
  • Postpartum Period / psychology*
  • Psychological Theory
  • Walking
  • Women's Health