Fig. 2From: Inter-day reliability of surface electromyography recordings of the lumbar part of erector spinae longissimus and trapezius descendens during box liftingExample of the sEMG (mV) from erector spinae descendens (left and right) during standardized lift from floor to table in the forearm condition with a load of 30Â kg. The blue line shows rectification of the sEMG and the pink line shows the filtered sEMGBack to article page