задно рамо

как се прави това упражнение за задно рамо с разгъване на скрипец

http://www.bb-team.org/exercise/3504/

http://www.exrx.net/WeightExercises/DeltoidPosterior/CBRearDeltPull.html
http://www.exrx.net/WeightExercises/DeltoidPosterior/CBRearDeltRow.html
http://www.exrx.net/WeightExercises/DeltoidPosterior/CBRearLateralRaise.html
http://www.exrx.net/WeightExercises/DeltoidPosterior/CBSeatedRearLateralRaise.html
http://www.exrx.net/WeightExercises/DeltoidPosterior/CBStandingCrossRow.html