There is a book b y Chris Hart called "Figure It Out" that really helped me with proportions. Tried to add the amazon link but it didn't work so if you search Chris Hart book proportions and you should find it.
I try to draw a superhero pose
Artist's notes:
I can get the proportions right like arms, upper body specifically chest and muscle and, legs. Can anyone recommend some exercises for ticket drawing and artist on Instagram for master studies. The main problem is I can't improve