Female breast cancer is one of the most dreaded neoplasms and connected with a high death rate [ 1 – 4 ]. The risk for breast cancer can be diminished within limits by avoiding tobacco products and by observing weight control [ 5 ]. Also, alcohol consumption has been consistently associated with an increased risk for breast cancer [ 6 , 7 ]. Another parameter is diet; vegetables, fruits and whole grains should constitute its central part [ 5 ]. Further, non-dietary risk factors for breast cancer are hormone replacement therapy for menopausal symptoms and ionizing radiation (e.g. from radiation therapy of cancer) [ 8 ]. A moderate to vigorous physical activity has been shown to be associated with a breast cancer risk decrease of approximately 25 % among women who are more active versus less active women [ 9 ].