A person bending forward to touch their toes is performing which movement around which axis?

When a person bends forward to touch their toes, they are performing flexion at the hip joints and the spine. This movement primarily occurs in the sagittal plane, which is responsible for movements that involve forward and backward motions.

The axis around which this movement takes place is the transverse axis (also referred to as the X axis). The transverse axis aligns horizontally from side to side across the body. When bending forward, the body moves down toward the ground, pivoting around this axis, allowing the trunk to flex forward smoothly. Flexion movements in the sagittal plane are typically characterized by this type of rotational movement around the transverse axis.

In the context of this question, the choice that correctly identifies the axis of rotation during the operation of bending forward to touch the toes is the X axis.