Powerful thigh extensor when climbing stairs it can also laterally rotate and abduct the thigh

It is true that powerful thigh extensor when climbing stairs it can laterally rotate and abduct the thigh, due to the combined action of the muscles that form it.

Explanation:

Thigh extensors are a group of muscles located in the front of the thigh, needed for walking, running, jumping, climbing stairs, or bending.

Thigh extensors form a combined structure, called the quadriceps femoris:

Rectus femoris. Vast medial or internal muscle. Vast lateral or external muscle. Vast medial muscle.

In addition, the longest muscle of the muscular system, the sartorius, is found within the thigh extensors.

When climbing stairs, one of the functions of the thigh extensors is to produce the external rotation and abduction - midline separation - of the thigh, a function specifically performed by the vastus laterale muscle.