Research published in The FASEB Journal has demonstrated that aerobic exercise may significantly reduce the health impacts of environmental nanoplastics in female zebrafish. In the study, adult female zebrafish were subjected to polystyrene nanoplastics for 21 days, either with or without moderate aerobic exercise. The results indicated that exposure to nanoplastics resulted in considerable ovarian accumulation of particle-like structures, increased oxidative stress, and disruption of reproductive hormones. Additionally, behavioral tests revealed anxiety- and depression-like symptoms in zebrafish exposed to nanoplastics, which were accompanied by elevated stress hormone levels. However, the introduction of aerobic exercise was shown to mitigate these adverse effects, improving both behavioral outcomes and reducing oxidative stress. Furthermore, aerobic exercise was linked to the restoration of gut microbiota imbalances caused by nanoplastics, which correlated with enhanced fatty acid and tryptophan metabolism. This suggests that aerobic exercise may protect against nanoplastic-induced neuroendocrine dysfunction through a gut–ovary–brain continuum. These findings underscore the potential of lifestyle interventions in addressing the health risks posed by environmental pollutants.