Table 1

Average myoelectric activity (expressed as %MVC) for each muscle studied across 4 different shoulder extension exercises.
Muscle
 Exercise Performed

Pulldown1
 Reverse2
 Slack SR3
 Retract SR4
Lats
 26.23 [10.1]
 22.37 [9.1]
 30.10 [14.9]
 37.08 [14.04]
Diff From*:
 3
 3
 1,2
 -
Biceps
 15.20 [8.05]
 19.89 [6.8]
 18.21 [7.1]
 19.92 [10.7]
Diff from
 -
 -
 -
 -
MTR
 22.72 [11.5]
 20.51 [10.9]
 29.77 [11.6]
 35.50 [17.6]
Diff from:
 -
 3
 2
 -
Ratio Lats:Biceps
 175.22 [84.4]
 111.48 [53.2]
 156.31 [81.0]
 186.48 [96.0]
Diff from:
 2
 1,3
 2
 -

*This row indicates which exercise [denoted by a superscripted column number [i.e 1 = pulldown exercise] results in statistically significant [p < .05] muscle activity. This only compares across columns [different exercises] for the same muscle group. It doesn't compare different muscle groups within an exercise. Lats=Latissimus Dorsi, Biceps = Biceps Brachii, Ratio Lats:Biceps is the average muscle activation ratio between the latissimus dorsi and biceps brachii for each exercise tested. Pulldown = pronated grip pulldown, Reverse = Supinated grip pulldown, Slack = Seated row allowing scapulae protraction, Retract = Seated row with encouragement to retract the scapulae

Lehman et al. Dynamic Medicine 2004 3:4   doi:10.1186/1476-5918-3-4