In subgroup analyses , we found an equal effect of different stressor types ( i.e. cognitive/emotional stress , work pace , and precision ) on muscle activity in both body regions .
In conclusion , simulated workplace stressors result in an increase in neck-shoulder and forearm muscle activity .
No indications were found that different types of stressors affect these body regions differently .
Workplace stressors have been indicated to play a role in the development of neck and upper extremity pain possibly through an increase of sustained ( low-level ) muscle activity .
The aim of this review was to study the effects of workplace stressors on muscle activity in the neck-shoulder and forearm muscles .
An additional aim was to find out whether the muscles of the neck-shoulder and the forearm are affected differently by different types of workplace stressors .
Muscle activity and cardiovascular response during computer-mouse work with and without memory demands
Computer-mouse work is characterized by repetitive movements combined with mental dem and s. The present purpose was to study how the body responded to simulated Computer Aided Design ( CAD ) work without memory dem and and when a high short-term memory dem and was introduced . Nine female subjects repetitively performed a task which involved 15 s of elevation of the right index and middle fingers followed by 6 s of rest . Every second time the fingers rested , the left index finger was required to type a six-figure number , either ‘ 123456 ’ ( without memory dem and ) or a r and om number shown half a minute before ( with memory dem and ) . After 7 min of performing the task without memory dem and , the memory dem and was introduced and continued for 1 h. Introduction of memory dem and result ed in increased heart rate ( 77 ← 84 beats/min ) , blood pressure ( systolic 129 ← 140 mmHg ; diastolic 72 ← 79 mmHg ) and forearm extensor muscle activity ( wrist , 2.7 ← 4.5 % EMGmax ; finger , 5.6 ← 7.5 % EMGmax ) and finger flexor muscle activity ( 0.7 1.2 % EMGmax ) indicating increased co-contraction . Hereafter , muscle activity and cardiovascular response tended to decrease . Self-reported stress and rating of perceived exertion ( RPE ) for the right shoulder increased throughout the period . Two additional sub- studies were inlcuded , which focused on adaptation to the physical load , showing a decrease in muscle activity and arousal , and re introduction of the memory load , showing a lower response as compared to the initial response . The practical consequences of the findings suggest that job content should have variable mental dem and
In subgroup analyses , we found an equal effect of different stressor types ( i.e. cognitive/emotional stress , work pace , and precision ) on muscle activity in both body regions .
In conclusion , simulated workplace stressors result in an increase in neck-shoulder and forearm muscle activity .
No indications were found that different types of stressors affect these body regions differently .
Workplace stressors have been indicated to play a role in the development of neck and upper extremity pain possibly through an increase of sustained ( low-level ) muscle activity .
The aim of this review was to study the effects of workplace stressors on muscle activity in the neck-shoulder and forearm muscles .
An additional aim was to find out whether the muscles of the neck-shoulder and the forearm are affected differently by different types of workplace stressors .