stressed/stressed out

Alley6223Americans get an average of six and a half hours of sleep a night. No wonder we are stressed.

Is there any difference if I say "we are stressed out" to replace the part in bold in the above?

They are similar; out is used as an intensifier.

Alley6223 Americans get an average of six and a half hours of sleep a night. No wonder we are stressed.

Is there any difference if I say "we are stressed out" to replace the part in bold in the above?

Yes. Actually it sounds better with "out" which in this case is an adverb modifying "stressed".

Actually, I'd say adding 'out' would mainly make the sentence sound more informal.

I agree. Stress is something that doctors agree is a real thing. Being "stressed out" describes a state of almost frantic activity and makes it less formal.

I think if one is stressed out, he is not going to care about the “formality”.

It’s it my ears? I usually hear people say “

I hear "stressed out" more often too, but agree that it is informal. "The wedding preparations are putting a lot of stress on Mary" would be a more formal way to say it.

I don't think we use "stressed" by itself very much---it tends to be either "stressed out" or just the noun.

Oh my ***, I don't think I can handle this stress much more! My sister-in-law is completely stressing

Hi,

'Stressed out' suggests to me that the person can't cope anymore.

'Stressed' does not suggest that the person can't cope. Everyone is stressed to some extent.

Best wishes, Clive

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1197275/