Effect of short-time vibration exposure on work movements with carpenters' hand tools

摘要: Abstract The purpose of this study was to analyze the effect ac ute vibration exposure on manual performance. Ten experienced healthy carpenters performed three standardized common tasks (nailing, sawing, screwing). EMG activity recorded from six arm-shoulder muscles/muscle group using surface electrodes, and performances were video-filmed. subjects also reted their exertions. After ten minutes (50 Hz, 20 m/s 2 ) repeated. number work movements time taken for each task recorded. In addition quality after first second trials compared. Changes in muscle mainly increased trapezius. most active muscles, with mean values exceeding 10% max , trapezius (mean 9–21% infraspinatus 6–18% flexor digitorum 15–21% ). Only rating perceived exertion while nailing higher vibration. Vibration seemed be very individually perceived. Short-time did not seem influence performance well-known tasks.