document: The effects of work pace on within-participant and between-participant keying force , electromyography , and fatigue A laboratory study was conducted to determine the effects of work pace on typing force , electromyographic -LRB- EMG -RRB- activity , and subjective discomfort . We found that as participants typed faster , their typing force and finger flexor and extensor EMG activity increased linearly . There was also an increase in subjective discomfort , with a sharp threshold between participants ' self-selected pace and their maximum typing speed . The results suggest that participants self-select a typing pace that maximizes typing speed and minimizes discomfort . The fastest typists did not produce significantly more finger flexor EMG activity but did produce proportionately less finger extensor EMG activity compared with the slower typists . We hypothesize that fast typists may use different muscle recruitment patterns that allow them to be more efficient than slower typists at striking the keys . In addition , faster typists do not experience more discomfort than slow typists . These findings show that the relative pace of typing is more important than actual typing speed with regard to discomfort and muscle activity . These results suggest that typists may benefit from skill training to increase maximum typing speed . Potential applications of this research includes skill training for typists
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