Working with volumes

Hi everyone,

its been a while since my last post so I thougt it would be a good idea to ask for more critique that could ponit out my mistakes.
Since the last critique I tried to focus on the anatomical strucutre in the longer drawings and on the volumes and overall gesture in the shorter ones. I am especially interested in opinions on the volume drawings because I never tried these before. I usually start with a black shape and put lighter values later.
I am looking forward for your opinions. :)



20 min.



20. min.



20. min



10. min



10. min

[img]https://www.pinterest.de/pin/585679126515486402/[/img]



1-2 min.