PARK7 and Parkinson disease: The expression of mir‐874, significantly elevated in PD rats (p = 0.001 vs. control), was normalized following exercise (p = 0.02 vs. trained), while DJ‐1, a neuroprotective gene downregulated in PD (p = 0.02 vs. control), was restored in the exercise group (p = 0.04 vs. trained).