A way to make sure your stride was even, arms pumping.

The child ran with both arms pumping, and face screwed up.

Their two arms pumped up and down as they ratified the decision.

He was running slowly but steadily, arms and legs pumping.

And Lula started running for the car, knees up, arms pumping.

Joseph flashed between the trees with his head down, arms and legs pumping.

It really was a march, with head thrown back, arms pumping, legs snapping forward one after the other.

She demonstrated with her arms pumping up and down.

He charged straight toward her, his head low, his arms pumping.

The entire body was slanted forward, in the direction of its speed, both the arms and legs pumping.