Pang, D.; Zhan, N.; Liu, J.; Mao, Z.; Teng, Y.; Chen, T.; Lin, X. The Impact of Physical Activity Participation on Subjective Well-Being Among Middle-Aged Adults: The Parallel Mediating Roles of Perceived Social Fairness and Aging Anxiety. J. Hum. Sport Exerc. 2026, 21 (2), 475-489. https://doi.org/10.55860/m6hf9450.