Search terms related to the topics of interest were used in different combinations, including “aromatase inhibitors” or “aromatase inhibitor”, and “breast cancer” or “breast carcinoma” or “breast neoplasm”, and “exercise” or “aerobic” or “resistance” or “yoga” or “tai chi” or “walking” or “running”, as well as “arthralgia” or “joint pain”. This evidence concerns the gene CYP19A1 and breast carcinoma.