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Table 1 Mean, minimum, and maximum values of the median and range of amplitude of trapezius muscle activity and the median and range of motion of shoulder, head, neck, and torso postures across all participants (n = 117)

From: Prediction of trapezius muscle activity and shoulder, head, neck, and torso postures during computer use: results of a field study

  Median    Range of Amplitude/Range of Motion
  Mean Minimum Maximum Mean Minimum Maximum
Shoulder EMG (%MVC)       
Right Trapezius 5.43 0.33 16.19 7.90 0.82 28.61
Left Trapezius 4.29 0.29 18.30 7.91 0.82 28.61
Shoulder Posture (degrees)       
Right Abduction 13.12 -34.08 39.96 15.30 1.67 62.15
Left Abduction 7.17 -29.66 29.31 16.56 5.13 53.20
Right Flexion 12.08 -23.50 46.53 24.42 2.71 52.31
Left Flexion 12.71 -14.62 41.19 26.52 7.35 56.15
Right Internal Rotation -2.33 -28.87 49.83 44.47 10.47 77.64
Left Internal Rotation 22.31 -18.56 60.63 28.52 5.60 71.32
Head Posture (degrees)       
Tilt -0.94 -20.54 9.27 11.04 4.37 80.70
Flexion 12.14 -13.76 43.31 26.94 4.01 67.29
Neck Posture (degrees)       
Tilt -0.88 -18.43 8.39 8.47 3.35 21.80
Flexion 11.49 -34.96 31.64 15.63 4.34 47.09
Torso Posture (degrees)       
Tilt -1.90 -19.54 4.43 7.56 2.69 38.29
Flexion 13.89 -15.64 50.07 17.67 4.12 43.58