You've improved for sure, and that newer pose is much more dynamic! Good job, but you still have a bit of work to go.
Hands are super difficult and intricate, so your progress on those is going rather well, but there are some other issues with shoulders and hips that... well, actually, I remember making when I was a little younger, too. I think they're something you'll naturally progress through as you keep drawing, so don't worry too much, but I'm gonna link some tools and tutorials for you!
http://thepunchlineismachismo.com/images/drawingstuff.jpg
Heads and faces + Muscle Structure (you should study the muscles from time to time-- I've found that trying to be realistic hampers my ability to learn the structure, so color blocking like in this tutorial works pretty nicely for a simple alternative)
http://thepunchlineismachismo.com/images/abref.jpg
Just on the same note as the above while I'm here I may as well post this whoops
Just to introduce the idea of manufactured abs vs natural abs and ectomorph/mesomorph/endomorph.
http://www.floobynooby.com/pdfs/gesturedrawingforanimation.pdf
Free and slightly unpolished old PDF version of "Drawn to life: 20 Golden Years of Disney Master Classes: The Walt Stanchfield Lectures". I can recommend buying both full books, they're about $17-$30 and extremely good resources to have both now and in the future. Very inspirational.
My favorite basic non-inspirational notes of his are the ones on Tangents, Eyes, Stretches and Squashes and Hands. I'm not sure if they're in the PDF, but hey.
http://www.tfaw.com/Profile/Style-School-Volume-3-Nick-%7Cand%7C-Dent___350708
Style School Vol 2 and Vol 3 have some cute Anatomy tutorials in them if I'm remembering right... It's actually a shame they seem to have stopped publishing this, it was fantastically inspirational and helpful.
Otherwise, I couldn't recommend more than to do daily or weekly gesture and figure drawing.
A quick distinction just in case;
Figure is more like anatomical studies, putting the focus on how the body fits together, and you should allow yourself time to think about why the bones and muscles are sitting the way they do. A lot of these sketches end up feeling rather solid.
Gesture is the overall feel of the pose. Walt Stanchfield has some fantastic notes on this-- don't get caught up in details. A messy, unrefined, anatomically incorrect sketch that gets across the feeling of the pose is better than a static, but perfectly rendered drawing where you can't quite tell what the subject is doing.
It helps to make a little story in your head with these, and alter the composition of the model's pose to fit. Eg, rather than "a man with his arms up", "a man reaching for something on the highest shelf" puts a more vivid pose in your head. Gesture sketches tend to end up a lot more fluid and rarely are they rendered beyond a nose to tell what direction the model is facing.
There are a lot of good sites for doing these-- They all have nudes, but you can turn them off in most of them if that makes you uncomfortable.
http://lovecastle.org/draw/
http://artists.pixelovely.com/practice-tools/figure-drawing/
http://www.quickposes.com/
Ahh, anyway. Keep up the good work, and looking forward to seeing you improve even more!
![[K] of Honor](/data/medal/1_1406930084l.jpg)