April 10: IRSST Releases Study on Vibrating Tools


The IRSST released the results of a study on vibrating tools that may cause musculoskeletal injuries in workers’ upper limbs. Researchers measured, among other things, the effects of factors such as the wrist deviation and grip strength exerted on tool handles, vibration transmission and muscle load. They found that the greater the strength of the grip on the tool, the greater the transmission of the vibration. They also found that tools whose vibration amplitude was high (10 m/s2), and that emitted low frequencies (20 Hz), generated greater muscle stress.