Can you improve arm strength?

QBs are criticized for their lack of arm strength

He can't make this throw, or that throw

His deep passes float on him or lack zip

Is that something that can be greatly improved in the gym/practice or just slightly, or not at all?

If there is a lineman who just needs to get stronger, no one seems terribly worried about it, just work out and get stronger

But I've never heard arm strength talked about like that before

You and I can improve arm strength…QBs though, specifically NFL QBs or top draft candidates, not really. That’s because they’re already doing everything possible to be at the top of their game in that regard.

Their max ceiling is essentially already reached, and at that point it’s more about maintaining their max strength.