Innovation to motivation--pilot study of a mobile phone intervention to increase physical activity among sedentary women.
OBJECTIVE
This uncontrolled pilot study assessed changes in pedometer-measured step counts and self-reported physical activity during a 3-week mobile phone-based intervention. We also explored whether age, BMI, and psychosocial factors were associated with changes in step counts.


METHODS
Forty-one sedentary adult women in San Francisco, California were asked to report their pedometer steps using a study-supplied mobile phone from June to September 2008. In the second and third weeks, daily prompts delivered by the mobile phone encouraged participants to increase steps by 20% from the previous week.


RESULTS
Mean age was 48 years. Average daily total steps increased by approximately 800 or 15% over three weeks (p<0.001). Lower BMI, no antidepressant use, and lower self-reported health status were associated with higher step counts at baseline. Improvements in self-reported will-power were associated with increases in step counts (p<0.001). Neither age (p=0.55) nor BMI (p=0.13) was significantly associated with changes in activity over the 3 weeks.


CONCLUSIONS
The intervention appeared to motivate sedentary women to increase their physical activity. A randomized controlled clinical trial is warranted and feasible.
Fukuoka
Yoshimi
Y
Department of Physiological Nursing, University of California San Francisco, 2 Koret Way BOX0610 San Francisco, CA 94143, USA. Yoshimi.fukuoka@ucsf.edu
Vittinghoff
Eric
E
Jong
So Son
SS
Haskell
William
W
D000328:Adult; D000367:Age Factors; D000368:Aged; D015992:Body Mass Index; D040421:Cell Phone; D005260:Female; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D008875:Middle Aged; D009042:Motivation; D009043:Motor Activity; D010865:Pilot Projects; D012495:San Francisco; D057185:Sedentary Behavior