Horizontal plane pelvic rotation effectively does what to the reaching leg?

Horizontal plane pelvic rotation effectively does what to the reaching leg?

• A. Lengthens it
• B. Internally rotates the ankle
• C. Eliminates hip motion
• D. Shortens it

Answer: (A)

When the pelvis rotates in the horizontal (transverse) plane, it reorients the entire limb system so the reaching leg can extend farther in the reach direction. This pelvic rotation adds a lateral component to the leg’s position, effectively increasing the distance from the hip joint to the reaching foot. In other words, the reach is lengthened due to the change in alignment, not because the bones themselves get longer. The ankle doesn’t mainly change its rotation from this movement, the hip isn’t eliminated in its motion, and the leg isn’t shortened—the effect is to increase how far the leg can reach.

When the pelvis rotates in the horizontal (transverse) plane, it reorients the entire limb system so the reaching leg can extend farther in the reach direction. This pelvic rotation adds a lateral component to the leg’s position, effectively increasing the distance from the hip joint to the reaching foot. In other words, the reach is lengthened due to the change in alignment, not because the bones themselves get longer. The ankle doesn’t mainly change its rotation from this movement, the hip isn’t eliminated in its motion, and the leg isn’t shortened—the effect is to increase how far the leg can reach.