Comparing the effects of text messaging and mobile social networking on physical activity and anthropometric indices of middle-aged women: a randomized controlled trial

BACKGROUND: Physical inactivity is a global health problem which is more prevalent among women. Among different age groups, middle-aged women are more vulnerable to physical inactivity as one of consequences of menopause. This study aimed to compare the effect of text messaging and that of mobile social networking on the improvement of physical activity and anthropometric indices of middle-aged women in Iran. METHODS: This was a randomized controlled trial in which 110 overweight or obese women who were physically inactive were recruited and allocated into two groups of text messaging (n = 55) or mobile social networking (n = 55). Women in both groups received information regarding the necessity, benefits, and barriers of physical activity and how to overcome these barriers for 12 weeks. The International Physical Activity Questionnaire (IPAQ), and a demographic questionnaire were used to collect data. Anthropometric indices including weight, height, waist circumference, hip circumference, waist/hip ratio, and body fat percentage were measured at baseline, as well as 4, 8, and 12 weeks after intervention. Data were analyzed using independent t-test, Chi-square, and repeated measure test. RESULTS: In the mobile social networking group, most women had moderate physical activity after 12 weeks (P < 0.05). The mean physical activity and energy expenditure were significantly higher in the mobile social group than those in the text messaging. In the 12th week of intervention, there was a significant reduction in the weight and BMI of the participants in the mobile social networking group compared to the text messaging group (P < 0.05). The waist and hip circumferences of women in the mobile social networking group reduced significantly after 12 weeks of intervention in comparison to the text messaging group (P = 0.001). The two groups did not show any significant difference regarding waist/hip ratio. While the body fat percentage was reduced in the mobile social networking group in the 4th, 8th, and 12th week of intervention, the differences between the two groups was not significant. CONCLUSION: Both text messaging and mobile social networking were effective in promoting physical activity and reducing anthropometric indices except for waist/hip ratio and body fat percentages, but the effect of mobile social networking was more pronounced. Thus, mobile social networking is recommended for promoting physical activity among middle-aged women.