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Table 5 Segment joint angles at peak compression (degrees, mean ± SE)

From: A randomized cross-over study of the quality of cardiopulmonary resuscitation among females performing 30:2 and hands-only cardiopulmonary resuscitation

Forearm segment angles
  Hands-Only CPR 30:2 CPR
  Younger Older All Younger Older All
Early 108.8 ± 0.7 112.6 ± 0.8 110.7 ± 0.6 109.2 ± 0.7 110.0 ± 0.8 109.8 ± 0.5
End 105.8 ± 0.7 110.5 ± 0.8 108.1 ± 0.6 107.1 ± 1.0 109.0 ± 0.8 108.1 ± 0.6
Across time 107.3 ± 2.2 111.5 ± 1.5   108.2 ± 0.2 109.5 ± 0.7  
Upper arm segment angles
  Hands-Only CPR 30:2 CPR
  Younger Older All Younger Older All
Early 84.1 ± 1.6 83.1 ± 1.7 83.6 ± 1.2 83.2 ± 1.6 82.9 ± 1.6 83.1 ± 1.1
End 84.6 ± 1.6 83.9 ± 1.7 84.2 ± 1.2 80.6 ± 1.7 79.5 ± 1.6 80.0 ± 1.2
Across time 84.3 ± 1.3 83.5 ± 1.5   81.9 ± 1.4 81.1 ± 1.4  
Trunk segment angles
  Hands-Only CPR 30:2 CPR
  Younger Older All Younger Older All
Early 214.3 ± 2.1 215.1 ± 2.4 214.7 ± 1.6 213.5 ± 2.1 215.9 ± 2.2 214.7 ± 1.5
End 214.1 ± 2.1 220.9 ± 2.4 217.5 ± 1.6 214.1 ± 2.7 215.0 ± 2.2 214.5 ± 1.6
Across time 214.2 ± 1.8 218.0 ± 2.1   213.8 ± 2.1 215.5 ± 1.9