Conclusion
This study constitutes the first to test whether a digital self-control coaching intervention has an effect on physical activity. The results suggest that a digital intervention targeting self-control can help people increase their MET levels for physical activity. Also, individuals with higher levels of conscientiousness and those who show greater increases in self-control are more likely to become more physically active. This intervention study highlights the notion that the effects of behavior change interventions may depend on personality characteristics and outcomes may be improved when individual differences are considered and targeted.