Table 5 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 erector spinae surface electromyography during standardized box lifting
| Â | Erector Spinae | |||||||
|---|---|---|---|---|---|---|---|---|
Absolute sEMG | Normalised sEMG | |||||||
Lifting condition | SEM (mV) | SEM % (%) | MDC (mV) | MDC % (%) | SEM (mV) | SEM % (%) | MDC (mV) | MDC % (%) |
Table to Table 3Â kg | ||||||||
 Short reaching distance | ||||||||
  Left | 5.0 | 12.2 | 13.9 | 33.9 | 1.5 | 10.2 | 4.0 | 28.3 |
  Right | 10.0 | 22.4 | 27.6 | 62.0 | 3.7 | 23.6 | 10.3 | 65.3 |
 Long reaching distance | ||||||||
  Left | 4.8 | 9.4 | 13.3 | 26.0 | 1.8 | 10.5 | 5.1 | 29.2 |
  Right | 7.9 | 15.2 | 21.9 | 42.0 | 2.9 | 15.9 | 7.9 | 44.1 |
 Trunk rotation | ||||||||
  Left | 7.1 | 12.4 | 19.7 | 34.4 | 2.3 | 11.9 | 6.3 | 33.0 |
  Right | 8.6 | 24.8 | 23.7 | 68.8 | 2.1 | 17.5 | 5.7 | 48.5 |
Table to Table 15Â kg | ||||||||
 Short reaching distance | ||||||||
  Left | 10.5 | 13.8 | 29.0 | 38.4 | 3.6 | 13.9 | 9.9 | 38.4 |
  Right | 9.0 | 11.6 | 24.9 | 32.1 | 3.0 | 11.2 | 8.4 | 31.1 |
 Long reaching distance | ||||||||
  Left | 9.4 | 9.3 | 25.9 | 25.8 | 4.1 | 12.1 | 11.3 | 33.6 |
  Right | 15.0 | 14.6 | 41.4 | 40.5 | 3.5 | 10.2 | 9.8 | 28.1 |
 Trunk rotation | ||||||||
  Left | 12.9 | 13.5 | 35.8 | 37.4 | 3.7 | 11.6 | 10.3 | 32.3 |
  Right | 26.7 | 38.6 | 73.9 | 107.0 | 6.5 | 27.7 | 18.0 | 76.8 |
Table to Table 30Â kg | ||||||||
 Short reaching distance | ||||||||
  Left | 13.2 | 11.2 | 36.6 | 31.0 | 6.0 | 15.2 | 16.7 | 42.0 |
 Right | 15.9 | 13.2 | 44.1 | 36.5 | 4.5 | 10.9 | 12.4 | 30.1 |
Floor to Table 3Â kg | ||||||||
 Short reaching distance | ||||||||
  Left | 15.4 | 12.7 | 42.7 | 35.1 | 4.2 | 10.8 | 11.6 | 29.9 |
  Right | 18.4 | 14.6 | 51.0 | 40.4 | 5.7 | 13.5 | 15.7 | 37.3 |
 Long reaching distance | ||||||||
  Left | 21.4 | 16.9 | 59.4 | 46.9 | 7.8 | 19.1 | 21.5 | 52.9 |
  Right | 26.1 | 20.7 | 72.1 | 57.4 | 8.4 | 20.0 | 23.4 | 55.4 |
 Trunk rotation |  |  |  |  |  |  |  |  |
  Left | 15.1 | 12.6 | 41.8 | 35.0 | 4.9 | 12.7 | 13.5 | 35.3 |
  Right | 25.5 | 21.0 | 70.8 | 58.3 | 7.8 | 19.0 | 21.7 | 52.7 |
Floor to Table 15Â kg | ||||||||
 Short reaching distance | ||||||||
  Left | 17.7 | 10.2 | 49.2 | 28.2 | 8.2 | 14.6 | 22.7 | 40.3 |
  Right | 23.5 | 13.3 | 65.2 | 36.8 | 9.1 | 15.3 | 25.1 | 42.5 |
 Long reaching distance | ||||||||
  Left | 24.1 | 12.7 | 66.8 | 35.3 | 12.9 | 21.0 | 35.7 | 58.3 |
  Right | 29.9 | 15.9 | 82.8 | 43.1 | 12.3 | 19.2 | 34.0 | 53.2 |
 Trunk rotation |  |  |  |  |  |  |  |  |
  Left | 15.1 | 8.9 | 41.8 | 24.8 | 7.6 | 13.7 | 21.0 | 38.1 |
  Right | 21.1 | 12.1 | 58.4 | 33.5 | 8.2 | 14.0 | 22.8 | 38.9 |
Floor to Table 30Â kg | ||||||||
 Short reaching distance | ||||||||
  Left | 28.7 | 13.1 | 79.5 | 36.3 | 15.0 | 21.0 | 41.5 | 58.1 |
  Right | 33.8 | 15.0 | 93.6 | 41.7 | 11.8 | 15.9 | 32.7 | 44.0 |