Marziyeh Pourmand - Department of Biology, Zarghan Branch, Islamic Azad University, Zarghan, Iran
Mohammad Javad Mokhtari - Department of Biology, Zarghan Branch, Islamic Azad University, Zarghan, Iran

Cancer is a class of diseases characterized by out-of-control cell growth. After digestivesystem cancer, breast cancer has the second excess of mortality in Iran. Between feedingelements, fat is the most important element in catching cancer. Physical activity is one of theelements that can prevent cancer by decreasing fat, stress, etc. Increase of Estrogenhormone in body; increase the danger of women breast cancer on the other hand, in peoplewho do physical activity systematically, the breast cancer are 20 percent less. Aerobictrainings by changing (dissection) estrogen hormone and body metabolism and the decreaseof fat are the cause of descending cancer hormones. The age of catching cancer in Iran is 40-50 and in Europe is 50-60. Whereas in old ages immune system is noticeably decreasingthat may be the cause of incidence of cancer. Physical activity can be effective in preventingcancer by recovery of immune system condition. Previous studies show that the women whowalk one hour in week by velocity of 3-4 km contact cancer and its problems less incomparison to less than one hour in a week.

Breast Cancer, Physical Activity, Estrogen Hormone, Cancer, Fat