Final answer:
Patients with a big hip flexion contracture generally exhibit a posterior pelvic tilt due to the shortening of hip flexor muscles.
Step-by-step explanation:
Patients with a big hip flexion contracture will typically present with a posterior pelvic tilt. This tilt is due to the shortening of hip flexor muscles, which forces the pelvis to rotate backward. In a posterior pelvic tilt, the front of the pelvis rises, and the back of the pelvis drops. Understanding the mechanics of the hip joint is essential as it is a multiaxial joint that allows for various types of movement, including anterior-posterior, medial-lateral, and rotational movements.