Cillian P. McDowell

TL;DR: No longer meeting PA guidelines and increased screen time were associated with worse depression, loneliness, stress, and PMH, and self-isolation/quarantine was associated with higher depressive and anxiety symptoms compared to social distancing.

TL;DR: Resistance exercise training significantly reduced depressive symptoms among adults regardless of health status, total volume of prescribed RET, total prescribed volume of RET, or significant improvements in strength.

TL;DR: RET significantly improves anxiety symptoms among both healthy participants and participants with a physical or mental illness and should be compared to other empirically-supported therapies for anxiety.

TL;DR: Available evidence suggests that engaging in physical activity protects against anxiety symptoms and disorders, however, notable challenges in the current evidence base include issues regarding exposure and outcome measures, consistent adjustment for putative confounders, representativeness of samples, and attrition bias, which warrant further research.

TL;DR: Due to an error during production, the final version of the manuscript containing the original manuscript for the second edition of the Ph.D. thesis was withdrawn and a new manuscript is to be written to replace it.