Table 1.

Timeline for Data Collection Related to Secondary Data Analyses and Intervention

Time	Data collection and Intervention
Prior to intervention	Measures (baseline) Self-efficacy (administered week 6) Outcome expectations Physical activity (self-report, device)
Weeks 1–24	Intervention: adoption phase   Group behavioral meetings total 5 meetings (held every 4–5 weeks over 24 weeks)   Telephone condition (each group for behavioral meetings received a different condition)     Personal motivational telephone calls (between behavioral meetings total 6)     Automated telephone calls with motivational tips (between behavioral meetings total 6)     No telephone calls Measures (24 weeks)   Outcome realizations   Social support from behavioral meetings
Weeks 25–48	Intervention: maintenance phase  Behavioral meetings (one delivered at approximately week 36)  Telephone condition    Personal motivational calls (1 call before and 1 call after the behavioral meeting)    Automated motivational tips (total 1 before and 1 after behavioral meeting)    No calls
End intervention	Measures  Physical activity (self-report, device)