I've got used to reading standing up.
Does anyone else find this better.

It helps me personally because I am more focused.I have to hold the book correctly to make sure it doesn't fall.I can also get more comfortable, in a position I like.
I can never get comfy sat down for ages.
Afterall it's not natural for humans to sit down for a long periods anyway, were supposed to be hunter gatherers right

Also, think of all the calories you burn off by standing up instead of slouched.
Of course you don't have to always stand up, but I would recommend it.

The weight of the big book I'm reading also reminds me to take regular breaks because it gets a bit tiring holding the book for too long.

Try it.

Thanks