Extensors in the arms

Position your hands at an arm's length from the wall.

You should have a distance between your hands which is a bit greater than the distance between your shoulders.

Take a small step back so that your body is slanted toward the wall.

Bend and stretch your arms.

Avoid bending your hips.

Do this exercise a total of 30 times.

Take an appropriate break after every tenth repetition so that your breathing can also keep up.