>>5741304art "warmup" is an absolute meme. you don't need warmup for art the same way you don't need any warmup for math or learning foreign language. its not physical exercise where you strain your muscles and are at risk of serious injury dumbass.
what you posted are just some sheets for general exercise. Things that you do a couple of times to gain a muscle memory and basic understanding of perspective (the boxes) and thats it.