In this study, random blocking method will be used for random allocation of samples in the intervention and control groups, based on marital status (single and married) and BMI (<20, 20-25 and> 25). For this purpose, double blocks will be considered. The two possible blocks are TC and CT, that T stands for the intervention group and C stands for the control group. Numbers will be generated randomly (with the RANDBETWEEN command in Excel software and in ranges 1 and 2) and according to the production values of one of the blocks (for production number 1 CT block, for production number 2 TC blocks) will be selected and samples will be allocated. For example, two married people with a body mass index of 20-25 have been referred, one to be included in the intervention group and the other one in the control group. In Excel software, between number one and two, assuming the number two is selected randomly. Therefore, these two people are assigned to the TC block. Accordingly, these two people are assigned to refer to this block in order. In fact, the first person enters the intervention group and the second person enters the control group. Now, if the number one is chosen, these two people will be assigned to the CT block.