The Relationship between Dimensions of Emerging Adulthood and Behavioral Problems among Chinese Emerging Adults: The Mediating Role of Physical Activity and Self-Control

Emerging adulthood (EA) is a critical stage of life to develop and sustain a healthy lifestyle, which is also a time of vulnerability to poor physical and mental health outcomes. In this study, we conducted a path analysis (N = 1326) to examine associations among four dimensions of EA, levels of regular physical activity (PA), self-control, MPA tendency and irrational procrastination. Results found: 1) higher levels of PA predicted both MPA tendency (β = −0.08, 95% CI: −0.11 to −0.06, p < 0.001) and irrational procrastination (β = −0.01, 95% CI: −0.17 to −0.008, p < 0.01) indirectly via self-control; 2) Instability (β = 0.13, 95% CI: 0.08 to 0.18, p < 0.01) and Responsibility (β = −0.06, 95% CI: −0.10 to −0.08, p = 0.03) exerted direct effects on irrational procrastination and Instability also indirectly predicted irrational procrastination via MPA tendency (β = 0.03, 95% CI: 0.02 to 0.05, p < 0.01). These findings proved that perceived features of EA are linked to behavioral problems and supported that regular PA plays a crucial role to protect mental health.