The majority of studies on resistance training show acute and/or long term reduction of inflammation: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2933442/
At least two mechanisms within this are partially understood: myokine expression and interleukin-10. However, like any complex biological system, inflammation is complex. Each lifestyle behavior sends a signal. And resistance training, by itself, cannot completely overcome lack of sleep (pro-inflammatory), detrimental eating (pro-inflammatory), and overall stress mismanagement (also pro-inflammatory).
Nonetheless, a strong body is more resilient than a weak one... against everything. And when all of these factors are put together to balance inflammation, the status is no longer fear but readiness.