Abstract
The aim of this research was to assess the impact of a cognitive–behavioural intervention on the short-term adherence to exercise of previous sedentary women living in a rural area in Spain. A sample of 30 sedentary women, 49–69 years old, with normal bone mineral density (BMD) or osteopenia were randomly assigned to one of two groups. The control group received four monitored sessions of exercise once a week, while the experimental group attended four additional sessions where strategies to improve adherence to exercise were implemented. The short-term adherence of participants was self-reported in two periods. The first period of 4 weeks consisted of independent walking sessions twice per week, and the second period included attendance at unsupervised group sessions twice per week during the following 5 weeks. Data from 27 subjects attending at least three out of four monitored sessions were analysed. The short-term adherence of the experimental group to the independent walking sessions was significantly higher than the adherence of the control group; however, no significant between group difference was found in adherence to the unsupervised group sessions. In conclusion, the intervention based on the Transtheoretical Model (TTM) improved adherence to walking exercise sessions only during the intervention implementation period.