Changes in identity and habit formation during 3 months of sport and physical activity participation among parents with young children.

Understanding factors that might contribute to sustained moderate-to-vigorous intensity physical activity (MVPA) after the initial start of participation is important. The purpose of this study was to examine the changes in PA habit and identity, two constructs purported to drive behavioral maintenance, among parents of young (< 13 years of age) children participating in a PA intervention across 3 months. Parents (team sport n = 58; individual PA n = 60; control n = 66) completed measures of PA habit, PA identity, and self-reported MVPA at baseline, and post-randomization at 6 weeks and 3 months. Identity and habit showed an increase across time, and these changes interacted with group condition assignment. Identity increased for participants in the team sport condition and was significantly different from a stable profile among those assigned to the control condition. Participants in the individual PA condition increased identity from 6 weeks to 3 months. Habit had a more attenuated change across time, with participants in the team sport condition showing an increase from 6 weeks to 3 months compared with the other conditions. The findings contribute to our understanding of maintenance processes and represent the first exploration of how involvement in team sport might shape subsequent habit and identity development.