I'm gonna edit this post with critique about the two latest posts, but I'll have to wait until lunch!
I'm gonna crit benza right now because .. Goddamnit lunch is over and I don't have time O: I just started looking at Benza's stuff so that's all I have time for at the moment.
Let's start with running pose!
Drawing-wise, your stroke economy isn't all that hot. There's a lot of scribbly lines that only confuse. One of the better things about trying to draw long strokes is that even if you fail, it will be much clearer to you what to fix; when drawing a hundred ambiguous scribbly lines, it's very hard to know what to fix up. This goes for silhouettes too. try to make them solid and readable to some extent the moment you draw them.
Anyways! Good silhouette likeness. Proportions also feel good.
There are small portions where I thought you didn't catch the dynamic of the original picture (although the main dynamic of the original image has lots to do with the lines in the background)
- torso should be tilted forward just a bit more
- star for solid likeness in leg area
- arms have much more curvy and dynamic lines than you captured them
- face is full frontal angle
- shoulder sticks out, our right
- foot is sorta wonkyhttp://i388.photobucket.com/albums/oo326/endisaster/CortlinSprinting.jpg
<- visual pointers
Regarding the relaxed pose, it's not as good as the dynamic one. It's very awkwardly rendered, but here also the silhouette is lost.
It's not a good idea to make anatomy practise out of this one, since the baggy clothes hide the person under, and you have to imagine the anatomy of the body, which I think has sidetracked you from really analyzing the model as much as you could've.
Hands: Again, wonk gets in the way of readability, both for me as a viewer and you as a drawer (you are furniture)
The original image is filled with nice shadow and light play that does a lot to explain the peculiarities of the shape of the hand, but it's the high contrast that gives us that benefit. Blurring and scribbling the picture out takes that away.
You should think more about how the segments of the fingers are all cylindrical shapes and their orientation in space, when you draw things like this. Try to make your mind into a 3D renderer and get inside the shapes. For example, you've placed the nails right as they are in the picture, but you should try to pry deeper within the forms and try to get their attachment to the surface right as well. The more you do that kind of stuff, the more you learn. Which is obvious, but it's really the truth.
All in all I'd say it's all very nice! Your mind is great at finding silhouettes and keeping proportions, esp. in 2D space, so I'm thinking you should make your mind work in 3D space a bit more.
Also do concentrate more on line placement and stop wonking so much! It makes it looks as though you draw worse than you actually do!
That's all! <3