Is it bad for the saphenous vein to sit for a long time?

It is said that sitting cross-legged is not good for the joints.

I think sofas are not good for the back.

I tend to stay at the dining table chair all day when I rest or watch something.

So, I tend to lower my legs downward.

Wouldn't this be good for intravenous injections?

Would using compression stockings help even if I keep my legs down?

Wearing compression stockings in summer may be uncomfortable and stuffy, but you know.