Rc/pe1>Im

I can't quite seem to tell if this is performed one arm at a time or both arms together, makes more sense in the context of the the other RC>iMs and I can only see one arm in the video but both shoulders appear to be being pulled out. Feel really stupid not being able to tell which way to do it :/

Coach answered the same question earlier today - this (upright lat lean) is done one arm at a time

It's a hard to tell for sure since you can't see the other arm, but yes Coach confirmed it's one arm. A quick test on your own should tell you why.

Thanks very much guys, apologies for the double post

Is it 30 seconds on each arm ?

Yes. Each arm.