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I would emphasize using a bit more curvy lines for the gesture, personally. And maybe getting in some shapes of volumes instead of mostly lines. I'm working on this myself, to get some more interesting gesture drawings. A combo can be good! I try getting the forearms and lower parts of the legs as volumes at least, but that is just a personal preferance :)
Also, exaggerating the counterbalance (the tilt) of the of hips and shoulders is nice.

These are a good starting point. People joke about drawing a stick person but it can actually be a good place to start learning gesture. If you can, look up some videos of people going over doing gesture drawing. They help explain the rhythms of the body and really getting those S and C curves. This will help with understanding the flow of human anatomy. :)

it looks nice, keep going! you could go more into detail, if you want. you got the proportions right and i like the movement. great sketches, overall

Nice job on your boldness and comitment of the gestures, SINE. I've got one small request: why don't you do another 1 hour class, please. That way, your gestures will be even more solid, fluid and livlier.

Thanks,

Polyvios Animations