Here we have two poses. The top figure is walking, and the bottom figure is putting itself on display, almost dancing. Of course, in the first shot of each pose, there's not much movement going on. These are way too stiff to be called action poses, so what can we do to improve on them? In the second shot for each pose, the main change is that I arched the backs. Putting your shoulders back creates a strong look, and the curve of the torso suggests forward movement. I also added curves to the arms and legs to give the figures a more natural look. Notice how the bottom figure's side is pinched in a V-shape as she lifts her leg. In the 3rd walking shot, I really exaggerated all the elements of the figure. The head is pointed up, the torso is twisted so the chest faces us and the pelvis faces away. The arms and legs are in more extreme positions, suggesting a big bounce in the character's step. He's basically jogging at this point. You can always overdo a pose, but this is just an illustration of the idea. In the 3rd lower shot, I again tilted the head upward, and made the limb positions more extreme. Notice how the upper leg attaches to the pelvis. The round attachment gives us a sense of depth. The side pinch is also more extreme here, which makes it appear as if she's just lifted her leg to the side quickly. This pose could be taken further, but then this would become a tutorial on animation.