Weakness during abduction with external rotation suggests a rotator cuff tear, potentially involving the supraspinatus or infraspinatus.

“if I abject you here and then externally rotate from there that's all rotator cuff and if that's weak as it is then you likely have a rotator cuff tear”

“here in neutral with your elbows at your side push out to the outside super strong now someone who has a big rotator cuff tiar that's going to go it's just going to give way”

“if I abduct you here and then externally rotate from there that's all rotator cuff and if that's weak as it is then you likely have a rotator cuff tear it can be the Super smoothness it can also be the infraspinatus”

“now someone who has a big rotator cuff tear that's going to go oh it's just going to give way and then we know that something significant is going on”