I like how you simplify the poses into simple shapes, but the lines are a bit stiff. You are using very basic lines and shapes, like the full ellipse for the calf in the 10m drawing.
To carry your lines forward and to draw with more flaw I suggest taking a look at Richard Powell's gesture drawing. study and imitate his drawings to discover the more lines and movements you can use to make your drawings more dynamic (and pleasing/satisfactory to your eye):
https://www.instagram.com/p/CCxKik3jeDW/
https://www.instagram.com/p/CCSI3pHjPIb/
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