Final answer:
In normal gait, the hip moves primarily in the sagittal plane, which includes movements like flexion and extension.
Step-by-step explanation:
In normal gait, the hip primarily moves in the sagittal plane. The sagittal plane is an anatomical boundary that divides the body into right and left portions and is associated with flexion and extension movements. For example, when looking at synovial joints, such as the hip joint, movements like walking involve flexing (bringing the thigh closer to the abdomen) and extending (moving the thigh away from the abdomen). Figures in anatomical textbooks illustrate this movement pattern, confirming that during normal gait, hip movements like swinging your leg forward and backward as you walk occur primarily in this plane.