Randomization was done by using random numbers in Excel software: First, in a column, the groups was entered as B, A, C below each other, because the number of samples in each group is 10 couples, so 10 B, A, C was entered below each other. In the opposite column, random numbers was generated by using the rand function. In the next step, by using the sort function,random numbers was sorted from small to large or inverse, so the order of the groups, B, A,C was changed. By the new order, individuals was allocated to intervention and control groups