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Table 6 Standard error of measurement (SEM (mV)), standard error of measurement in percent (SEM% (%)), minimal detectable change (MDC (mV)) and minimal detectable change in percent (MDC% (%)) of the absolute and normalized root mean square values of the left and right trapezius descendens surface electromyography during standardized box lifting

From: Inter-day reliability of surface electromyography recordings of the lumbar part of erector spinae longissimus and trapezius descendens during box lifting

  Trapezius
Absolute sEMG Normalised sEMG
Lifting condition SEM (mV) SEM % (%) MDC (mV) MDC % (%) SEM (mV) SEM % (%) MDC (mV) MDC % (%)
Table to Table 3 kg
 Short reaching distance
  Left 33.4 52.9 92.5 146.6 6.1 58.4 17.0 162.0
  Right 16.1 21.4 44.5 59.3 4.0 36.1 11.4 100.0
 Long reaching distance
  Left 44.7 55.3 123.8 153.3 7.4 57.2 20.4 158.5
  Right 26.3 30.1 73.0 83.5 5.3 40.6 14.8 112.5
 Trunk rotation
  Left 43.0 68.9 119.2 190.9 7.2 70.4 19.9 195.2
  Right 23.4 27.4 64.9 76.1 5.2 41.4 14.3 114.7
Table to Table 15 kg
 Short reaching distance
  Left 78.3 57.0 216.9 157.9 9.5 44.2 26.4 122.4
  Right 42.7 26.2 118.3 72.7 9.3 39.0 25.7 108.1
 Long reaching distance
  Left 89.9 43.0 249.2 119.1 15.6 48.2 43.1 133.5
  Right 62.8 25.6 174.0 71.0 12.1 33.5 33.7 92.8
 Trunk rotation
  Left 69.3 49.9 192.0 138.3 12.9 61.3 35.6 169.9
  Right 46.8 23.5 129.7 65.0 18.3 59.0 50.6 163.4
Table to Table 30 kg
 Short reaching distance
  Left 135.0 49.6 374.1 137.5 20.6 50.5 57.1 139.9
  Right 86.2 27.5 238.9 76.3 13.3 29.3 36.8 81.1
Floor to Table 3 kg
 Short reaching distance
  Left 35.5 50.9 98.4 141.0 6.2 53.5 17.1 148.2
  Right 24.8 31.7 68.8 87.9 3.6 32.2 10.1 89.1
 Long reaching distance
  Left 37.4 44.8 103.5 124.2 7.4 54.7 20.6 151.7
  Right 28.5 33.8 79.0 93.7 5.2 41.1 14.5 113.8
 Trunk rotation
  Left 33.7 51.2 93.5 141.9 5.5 52.0 15.1 144.3
  Right 27.3 30.7 75.7 85.1 4.3 33.8 11.8 93.7
Floor to Table 15 kg
 Short reaching distance
  Left 60.7 38.3 168.2 106.2 13.3 51.8 36.9 143.5
  Right 37.1 21.0 102.8 58.2 12.3 45.9 34.1 127.3
 Long reaching distance
  Left 65.2 32.8 180.7 91.0 14.3 45.9 39.7 127.3
  Right 47.4 20.6 131.4 57.1 22.2 61.6 61.6 170.7
 Trunk rotation
  Left 58.4 35.0 161.8 97.1 11.3 42.6 31.2 118.0
  Right 54.4 25.1 150.8 69.4 14.4 43.0 39.9 119.2
Floor to Table 30 kg
 Short reaching distance
  Left 128.2 40.0 355.3 110.8 19.7 39.7 54.5 110.0
  Right 71.2 22.3 197.5 61.8 24.0 49.5 66.6 137.1
  1. Forearm length = short distance, ¾ arm distance = long distance and trunk rotation = short distance with trunk rotation