Original scientific paper
Subjective rating of fatigue
Z. Bujas
; Institut za medicinska istraživanja i medicinu rada, Zagreb
Ž. Pavlina
; Institut za medicinska istraživanja i medicinu rada, Zagreb
B. Sremec
; Institut za medicinska istraživanja i medicinu rada, Zagreb
S. Vidaček
; Institut za medicinska istraživanja i medicinu rada, Zagreb
M. Vodanović
; Institut za medicinska istraživanja i medicinu rada, Zagreb
Abstract
After static efforts of various duration (30, 60, 90, 120, 150 and 180 sec.) subjects rated the degree of their feeling of fatigue on an unlimited scale without a given standard. On the same subjects were recorded, during static effort, the summed EMG of four active muscle groups. The results obtained showed that subjective ratings of fatigue in the function of duration of the static effort vary in the form of a mild sigmoid curve. The medium section of the average curve can be expressed by a potential function Ψ = 0,0048 (φ - 30")1, 54 where Ψ stands for the subjective degree of fatigue, φ for duration of the static effort and 30" represents presumed liminal value of the feeling of fatigue. The curve of the average summed EMG is very similar to that of the average rating of the feeling of fatigue in the function of duration of the static effort and can be expressed as EMG = 0,0051 (φ - 30")1, 51. Individual curves of the summed EMG differ to the same extent as the individual curves of subjective ratings of fatigue.
Keywords
Hrčak ID:
178530
URI
Publication date:
22.9.1966.
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