The smaller drawings here represent a moving pose. The more developed ones are 30 second - 2 minute warm ups.
Struggled to get the tension in the shoulder & arm that the model is leaning on. It needs subtle drawing in the muscles & position of the shoulder blades but I ended up making a hash of it. Limited time on this pose (20 mins) meant I was trying to find some quick marks to indicate the muscles bunching up but there's too many meaningless marks here.
Interesting to draw the hoop in these poses - it helps one gauge space & dimension when drawing.