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Table 3 Comparison of iEMG values between light and heavy groups

From: Relationship between weight of rescuer and quality of chest compression during cardiopulmonary resuscitation

  30 60 90 120 150 180 210 240 270 300 (s)
Biceps brachii (mV)           
Light 27.3 ± 12.8 26.5 ± 12.5 24.5 ± 10.1 25.1 ± 11.0 23.5 ± 9.5 24.3 ± 9.6 22.2 ± 8.7 23.9 ± 10.1 22.2 ± 9.7 23.2 ± 10.6
Heavy 28.5 ± 9.5 26.2 ± 6.9 24.0 ± 6.2 23.2 ± 6.9 22.7 ± 6.9 22.7 ± 7.4 22.2 ± 8.0 22.9 ± 8.7 22.9 ± 9.1 22.3 ± 9.2
Triceps brachii (mV)           
Light 69.5 ± 25.6 67.4 ± 22.5 65.7 ± 20.5 65.6 ± 18.2 67.3 ± 18.8 70.3 ± 18.8 68.7 ± 18.2 68.6 ± 17.0 68.4 ± 15.4 70.4 ± 16.8
Heavy 50.1 ± 9.0 51.1 ± 10.3 50.4 ± 11.3 52.0 ± 12.7 51.2 ± 13.5 52.5 ± 16.0 53.0 ± 16.0 55.2 ± 18.9 53.7 ± 17.0 55.8 ± 16.5
Trapezius (mV)           
Light 26.8 ± 14.8 25.1 ± 14.5 21.9 ± 11.2 21.0 ± 10.2 20.8 ± 9.6 21.9 ± 9.4 21.1 ± 8.0 22.3 ± 9.2 21.8 ± 7.2 25.5 ± 10.1
Heavy 14.3 ± 4.8* 13.7 ± 4.7 13.3 ± 4.9 13.5 ± 5.4 14.2 ± 9.0 13.6 ± 7.9 12.7 ± 5.2* 12.1 ± 3.9* 12.3 ± 5.4** 13.3 ± 5.8**
Erector spinae (mV)           
Light 19.0 ± 5.4 19.8 ± 6.3 19.4 ± 5.7 19.1 ± 5.0 18.7 ± 5.1 19.5 ± 5.4 19.1 ± 5.2 20.0 ± 4.8 20.0 ± 4.7 20.5 ± 4.4
Heavy 12.2 ± 4.9* 12.8 ± 6.0* 13.0 ± 5.4* 12.7 ± 4.8* 12.9 ± 4.5* 12.9 ± 3.9* 13.1 ± 4.3* 13.2 ± 4.3** 13.2 ± 4.8** 13.4 ± 5.1**
External oblique (mV)           
Light 22.0 ± 9.4 25.9 ± 14.2 22.6 ± 12.0 22.4 ± 11.8 19.6 ± 8.8 21.6 ± 9.6 20.6 ± 8.8 22.2 ± 10.2 21.0 ± 9.2 22.0 ± 10.5
Heavy 11.3 ± 6.3* 10.9 ± 5.4* 10.3 ± 4.9* 9.6 ± 4.1* 9.5 ± 4.6* 9.5 ± 4.4** 9.3 ± 4.5** 9.1 ± 4.1** 8.6 ± 3.9** 8.3 ± 3.2**
Abdominal rectus (mV)           
Light 18.4 ± 6.7 19.3 ± 10.3 18.2 ± 9.6 18.4 ± 11.2 17.3 ± 10.0 18.1 ± 9.5 17.3 ± 9.5 17.9 ± 10.7 17.6 ± 9.3 17.7 ± 9.5
Heavy 8.7 ± 3.5** 8.4 ± 3.3* 8.0 ± 2.7* 7.7 ± 2.7* 7.0 ± 2.4* 7.2 ± 2.4** 7.0 ± 2.5** 7.2 ± 2.8* 7.0 ± 2.6** 7.3 ± 2.9*
Rectus femoris (mV)           
Light 7.2 ± 2.3 8.6 ± 4.1 10.6 ± 5.6 11.1 ± 6.7 10.5 ± 6.8 11.2 ± 7.2 9.7 ± 5.9 10.2 ± 7.1 10.7 ± 6.5 11.1 ± 7.9
Heavy 4.3 ± 0.8** 4.1 ± 0.7* 3.7 ± 0.7** 3.7 ± 0.7* 3.5 ± 0.7* 3.7 ± 1.1* 3.4 ± 0.9* 3.7 ± 1.1* 3.9 ± 1.7* 3.5 ± 0.8*
Biceps femoris (mV)           
Light 32.3 ± 24.8 28.5 ± 18.2 24.0 ± 17.1 22.1 ± 15.3 23.3 ± 15.4 23.8 ± 15.5 24.3 ± 16.7 26.4 ± 16.7 26.4 ± 17.1 26.8 ± 15.7
Heavy 14.1 ± 6.6 15.2 ± 7.1 15.1 ± 5.6 15.1 ± 5.5 15.3 ± 5.5 14.7 ± 5.4 14.5 ± 4.8 14.5 ± 4.9 14.6 ± 4.5 14.5 ± 4.2
  1. Values are means ± standard deviation. Significant difference between light and heavy groups. (*P <0.05, **P <0.01; unpaired t test); n = 9 for all groups.