Besides vertical displacement, which displacement direction is emphasized by energy-saving strategies?

Besides vertical displacement, which displacement direction is emphasized by energy-saving strategies?

• A. Rotational displacement
• B. Side-to-side displacement
• C. Anterior-posterior displacement
• D. Diagonal displacement

Answer: (B)

Energy-saving strategies in movement aim to cut wasteful work in directions that don’t contribute to forward progress. Besides the vertical movement of the center of mass, the direction that gets targeted is side-to-side (medial–lateral) displacement. When the body sways laterally, muscles must work to push the center of mass back toward the midline, which costs energy. By stabilizing the trunk and pelvis and keeping side-to-side motion minimal, the body moves more efficiently. Rotational movement happens naturally but isn’t the main focus for saving energy, and forward progression relies on forward motion rather than reducing anterior-posterior displacement. Diagonal displacement isn’t the primary target either.

Energy-saving strategies in movement aim to cut wasteful work in directions that don’t contribute to forward progress. Besides the vertical movement of the center of mass, the direction that gets targeted is side-to-side (medial–lateral) displacement. When the body sways laterally, muscles must work to push the center of mass back toward the midline, which costs energy. By stabilizing the trunk and pelvis and keeping side-to-side motion minimal, the body moves more efficiently.

Rotational movement happens naturally but isn’t the main focus for saving energy, and forward progression relies on forward motion rather than reducing anterior-posterior displacement. Diagonal displacement isn’t the primary target either.