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Table 1 Muscle activation levels expressed as percentage of the Maximum Voluntary Contraction for bridging exercises on different surfaces.

From: Trunk muscle activity during bridging exercises on and off a Swissball

Exercise Pr Br Floor Pr Br Ball Side Bridge Su Br Ball Su Br Floor
Column # 1 2 3 4 5
IO Avg 29.5 39.8 42.5 19.7 12.3
Stdev 18.8 23.9 25.2 15.8 9.5
Different From* - 4,5 4,5 2,3 2,3
RA Avg 26.6 55.9 24.4 6.05 5.84
Stdev 11.1 28.8 11.7 1.3 1.1
Different From* 2,4,5 1,3,4,5 2,4,5 1,2,3 1,2,3
EO Avg 44.6 62.5 46.1 10.6 7.8
Stdev 14.8 26.3 15.4 5.7 6.3
Different From* 2,4,5 1,3,4,5 2,4,5 1,2,3 1,2,3
ES Avg 4.98 5.00 25.7 27.4 25.01
Stdev 1.05 1.46 11.3 7.56 9.02
Different From* 3,4,5 3,4,5 1,2 1,2 1,2
  1. * This row indicates which other exercise the myoelectric signal for the respective column is statistically different (p < .05) from. (Avg = Average muscle activity in % MVC, Stdev = Standard deviation, IO = Internal Oblique, RA = Rectus Abdominis, EO = External Oblique, ES = Erector Spinae. Pr Br = Prone Bridge, Su Br = Supine Bridge.