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Table 4 Mean ± SD absolute and normalized root mean square values (absRMS (mV) and normRMS (% of the highest RMS values of the three maximum voluntary contractions)) of the left and right trapezius descendens surface electromyograms during standardized box lifting at day 1 and day 2, intraclass correlation coefficient (ICC3.K) values and between-day normRMS difference for left and right erector spinae

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 Day 1 (mV) Day 2 (mV) ICC3.K Difference (mV) Day 1 (mV) Day 2 (mV) ICC3.K Difference (mV)
Table to Table 3 kg
 Short reaching distance
  Left 66.6 ± 36.0 59.7 ± 37.9 0.19 −6.9 ± 49.4 10.0 ± 6.5 11.0 ± 7.0 0.18 1.0 ± 9.1
  Right 80.2 ± 51.4 69.9 ± 36.5 0.87 −10.3 ± 30.0 11.2 ± 7.1 10.9 ± 6.2 0.64 −0.3 ± 6.8
 Long reaching distance
  Left 90.7 ± 57.3 70.8 ± 48.2 0.31 −19.9 ± 67.6 13.3 ± 9.7 12.4 ± 6.8 0.23 −0.9 ± 11.1
  Right 90.0 ± 69.3 84.9 ± 40.3 0.78 −5.1 ± 47.7 12.8 ± 9.2 13.5 ± 8.0 0.62 0.7 ± 9.1
 Trunk rotation
  Left 71.9 ± 51.5 53.0 ± 34.8 0.08 −18.9 ± 60.7 10.8 ± 8.7 9.6 ± 6.4 0.12 −1.2 ± 10.5
  Right 93.8 ± 67.7 76.9 ± 48.0 0.84 −16.9 ± 43.1 13.0 ± 9.2 12.0 ± 8.1 0.64 −1.0 ± 8.9
Table to Table 15 kg
 Short reaching distance
  Left 148.7 ± 89.1 126.0 ± 78.0 0.14 −22.7 ± 113.8 21.7 ± 14.5 21.5 ± 9.5 0.40 −0.2 ± 15.0
  Right 169.0 ± 91.9 156.3 ± 84.7 0.77 −12.7 ± 76.7 23.2 ± 11.9 24.4 ± 17.7 0.62 1.1 ± 15.8
 Long reaching distance
  Left 231.4 ± 156.3 187.0 ± 111.3 0.57 −44.4 ± 148.5 32.4 ± 22.9 32.4 ± 15.3 0.36 0.0 ± 24.4
  Right 267.0 ± 175.8 223.1 ± 121.3 0.83 −43.9 ± 114.9 36.1 ± 20.9 36.5 ± 28.5 0.76 0.4 ± 21.8
 Trunk rotation
  Left 153.6 ± 120.3 124.1 ± 72.1 0.52 −29.5 ± 112.7 21.4 ± 17.2 20.6 ± 8.7 0.11 −0.8 ± 18.7
  Right 216.6 ± 157.3 182.4 ± 125.6 0.89 −34.2 ± 88.3 32.0 ± 26.6 30.0 ± 28.8 0.57 −2.0 ± 30.5
Table to Table 30 kg
 Short reaching distance
  Left 308.0 ± 223.7 236.0 ± 128.4 0.47 −72.0 ± 214.2 43.2 ± 32.1 38.4 ± 13.3 0.30 −4.8 ± 31.5
  Right 344.7 ± 250.3 281.8 ± 160.0 0.84 −62.9 ± 157.9 46.9 ± 29.6 43.9 ± 35.3 0.83 −3.0 ± 24.6
Floor to Table 3 kg
 Short reaching distance
  Left 78.9 ± 45.6 60.7 ± 41.0 0.36 −18.2 ± 54.2 11.7 ± 7.6 11.4 ± 7.9 0.37 −0.3 ± 9.7
  Right 81.0 ± 69.4 75.5 ± 36.7 0.80 −5.5 ± 45.3 10.9 ± 8.2 11.7 ± 6.5 0.76 0.8 ± 6.5
 Long reaching distance
  Left 91.3 ± 60.3 75.4 ± 56.6 0.60 −15.9 ± 62.5 13.5 ± 10.5 13.6 ± 10.2 0.49 0.1 ± 12.1
  Right 86.9 ± 61.7 81.9 ± 46.9 0.73 −5.0 ± 50.6 12.0 ± 8.1 13.5 ± 9.7 0.66 1.5 ± 9.0
 Trunk rotation
  Left 70.1 ± 41.2 61.7 ± 41.7 0.35 −8.4 ± 52.2 10.0 ± 5.7 11.0 ± 7.3 0.31 1.0 ± 8.4
  Right 92.6 ± 70.8 85.2 ± 49.4 0.80 −7.4 ± 49.8 12.2 ± 8.2 12.9 ± 8.5 0.74 0.7 ± 7.6
Floor to Table 15 kg
 Short reaching distance
  Left 160.0 ± 96.3 156.8 ± 80.1 0.53 −3.2 ± 100.1 22.8 ± 14.2 28.7 ± 16.6 0.28 5.9 ± 20.0
  Right 178.3 ± 114.1 174.9 ± 85.3 0.86 −3.4 ± 89.5 26.2 ± 19.3 27.4 ± 18.7 0.58 1.2 ± 20.7
 Long reaching distance
  Left 216.2 ± 128.4 181.2 ± 92.0 0.67 −35.0 ± 111.6 30.1 ± 17.7 32.3 ± 17.2 0.33 2.2 ± 22.1
  Right 232.3 ± 134.7 228.3 ± 136.0 0.88 −4.0 ± 69.6 35.3 ± 28.8 36.9 ± 31.3 0.45 1.6 ± 35.8
 Trunk rotation
  Left 177.6 ± 101.4 155.7 ± 77.3 0.59 −21.9 ± 97.5 25.0 ± 14.3 27.9 ± 15.1 0.42 2.9 ± 17.8
  Right 241.5 ± 156.2 193.0 ± 102.1 0.84 −48.5 ± 99.2 35.5 ± 26.0 31.5 ± 23.5 0.67 −4.0 ± 24.8
Floor to Table 30 kg
 Short reaching distance
  Left 337.5 ± 203.4 304.2 ± 176.7 0.55 −33.3 ± 212.1 45.3 ± 23.9 53.8 ± 30.9 0.50 8.5 ± 31.8
  Right 336.1 ± 171.7 303.5 ± 171.8 0.83 −32.6 ± 131.1 47.9 ± 28.0 49.3 ± 41.0 0.53 1.4 ± 39.7
  1. Difference = difference in absRMS (mV) and normRMS (%) between day 1 and day 2. Forearm length = short distance, ¾ arm distance = long distance and trunk rotation = short distance with trunk rotation