Sampling will be done by convenience sampling. In this way, primiparous women referring to the maternity ward of Iran Hospital, Iranshahr, who meet the inclusion criteria, were included in the study after receiving the necessary explanations and signing the informed consent form.
After entering the study, participants will be assigned to one of three groups (squat exercise), (butterfly movement), (control group) using a block randomization method with an allocation ratio of 1:1:1.
The random sequence of blocks is prepared before the study begins by a person who is not involved in conducting the research and collecting the data, using random number generation software.
The allocation sequence is placed in opaque, sealed, opaque, numbered, and consecutive envelopes. After meeting the entry requirements and obtaining informed consent, the researcher opens the envelope corresponding to the same number and allocates the participant to one of the three study groups based on the group designated in the envelope.
To prevent bias, the randomization sequence will be kept confidential until each participant is allocated, and it will not be possible to predict the assigned group. Given the nature of the intervention, blinding of participants and the researcher is not possible; however, statistical analysis of the data will be performed by someone who is unaware of the group allocation.