Final answer:
The center of gravity shift from side to side during normal locomotion depends on the individual's posture and movement. It stays within the base of support to ensure stability.
Step-by-step explanation:
The center of gravity shift from side to side during normal locomotion depends on the individual's posture and movement. However, the shift is generally minimal and typically stays within the base of support, ensuring stability. For example, in Figure 9.18(a), the person's center of gravity (cg) is above the hip joints and lies between two narrowly-separated feet, providing stable equilibrium against sideways displacements. Although relatively small displacements can make the cg go outside the base of support, causing instability.