BACKGROUND: The purpose of this investigation was to characterize the scapular position and scapular muscle activation during the empty can (EC) and full can (FC) exercises. The EC exercise has been shown to produce scapular kinematics associated with the mechanism leading to @entity5818 ( @entity5818 ) but has not been investigated in @entity1 with ( @entity5818 ). This investigation will help improve the treatment of @entity1 with @entity5818 . METHODS: @entity1 with @entity5818 (n  =  28) performed 5 consecutive repetitions of FC and EC exercises. Scapular and clavicular 3-dimensional positions and scapular muscle activity were measured during each exercise. @entity158 was measured with the numeric @entity158 rating 11-point scale. RESULTS: @entity1 reported greater @entity158 during the EC exercise vs the FC exercise (difference, 1; P  =  .003). During the EC exercise, @entity1 were in greater scapular upward rotation (difference, 3  ; P  <  .001), internal rotation (mean difference, 2  ; P  =  .017), and clavicular elevation (difference, 3  , P  <  .001) and in less scapular posterior tilt (difference, 2  ; P  <  .001). There was greater activity of upper trapezius (difference, 4%, P  =  .002), middle trapezius (difference, 3%; P  <  .001), and serratus anterior (difference, 0.5%; P  =  .035) during ascent, and during the descent of greater upper trapezius (difference, 2%, P  =  .005), and middle trapezius (difference, 1%; P  =  .003), but less activity of the lower trapezius (difference,  1%; P  =  .039). CONCLUSIONS: The EC exercise was associated with more @entity158 and scapular positions that have been reported to decrease the subacromial space. Scapular muscle activity was generally higher with the EC, which may be an attempt to control the impingement-related scapular motion. The FC exercise of elevation is preferred over the EC exercise.

Empty can exercise provokes more XXXX and has undesirable biomechanics compared with the full can exercise.

@entity1 :: ('9606', 'Species') :: ['participants', 'patients', 'Participants'] @entity5818 :: ('MESH:D019534', 'Disease') :: ['SAIS', 'subacromial impingement syndrome'] @entity158 :: ('MESH:D010146', 'Disease') :: ['Pain', 'pain']
@entity158 :: (MESH:D010146,Disease) :: ['pain']
