Final answer:
Kegel exercises, perineal massage, and pelvic tilts are conditioning exercises that prepare a woman's muscles for childbirth, by strengthening pelvic floor muscles, increasing perineum elasticity, and promoting optimal baby positioning.
Step-by-step explanation:
Conditioning exercises such as the Kegel exercises, perineal massage, and pelvic tilts prepare the woman's muscles for the demands of birth. Kegel exercises strengthen the pelvic floor muscles, which support the pelvic organs and help control urination and play a role in vaginal contraction. A perineal massage can increase the elasticity of the perineum, potentially reducing the risk of tearing during childbirth. Pelvic tilts strengthen abdominal muscles and may ease back pain during pregnancy and labor while also promoting the optimal positioning of the baby for a vaginal birth.