A total of 153 women who have completed treatment for breast cancer in the last 12 months , with a Body Mass Index ( BMI ) of 20 to 35 kg/m2 , will be randomly assigned to one of 3 groups : 3g/d LCn-3s ( N-3 ) , a 12-week nutrition and exercise education program plus olive oil ( P-LC ) or the education program plus LCn-3s ( EX+N -3 ) .