Table 1.

Research queries used on each respective database.

Database	Query
Pubmed	((Breast cancer [Title/Abstract]) AND (exercise [Title/Abstract] OR Physical activity [Title/Abstract]) AND (DNA Methylation [Title/Abstract] OR DNMT [Title/Abstract] OR Epigenetics [Title/Abstract] OR methyltransferase [Title/Abstract] OR promoter methylation [Title/Abstract] OR methylome [Title/Abstract]))
Scopus	(TITLE-ABS-KEY (“breast cancer”)) AND (TITLE-ABS-KEY (exercise OR “physical activity”)) AND (TITLE-ABS-KEY (“dna methylation” OR epigenetics OR methyltransferase OR “promoter methylation” OR methylome OR dnmt)) AND (EXCLUDE (DOCTYPE, “re”))
Web of Science	((ALL = Breast cancer) AND (ALL = exercise OR ALL = Physical activity) AND (ALL = DNA Methylation OR ALL = Epigenetics OR ALL = methyltransferase OR ALL = promoter methylation OR ALL = methylome OR ALL = DNMT))