It's not new info, just more data to back it all up.
15 minutes of vigorous activity or approximately 1 hour of moderate activity like biking, walking or gardening may significantly reduce risks of major depression. This information is the result of a new study published in the JAMA PSYCHYATRY (2019) (Journal of the American Medical Association of Psychiatry)
Researches from Harvard and The Major Depressive Disorder Group of Psychiatric Genomics Consortium studied 611,583 male and female adults. Using genetic data they found higher levels of activity may cause reduce risk of depression as well as keep it at bay.