In other words a subject needs less reaction moment applied by the ground surface when there is arm swing.

With a swing of her right arm, she whipped the rope out from behind it.

She saw his arm swing, and caught the glitter of steel.

Contact the ball with the cupped fingers and a long arm swing.

Then, just as quickly, she stopped the swing of her arm and rolled her window back up.

With a swing of her arm, she adds, "Tell them the truth.

Paula saw his arm swing hard, down, up, then with a cross slash.

When used in this way, an exaggerated arm swing is often used.

It struck her with a hard, powerful swing of its handless arm.

He throws a phenomenal ball and has a nice loose arm swing.