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The Journal of Sports Medicine and Physical Fitness 2001 Giugno;41(2):183-8

lingua: Inglese

Mechanomyography, electromyography, heart rate, and ratings of perceived exertion during incremental cycle ergometry

Perry S. R., Housh T. J., Johnson G. O., Ebersole K. T., Bull A. J., Evetovich T. K., Smith D. B.

From the ­Center for ­Youth Fit­ness and ­Sports ­Research Uni­ver­sity of ­Nebraska, Lin­coln, USA


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Back­ground. The pur­pose of ­this inves­ti­ga­tion was to ­examine the rela­tion­ships of mcha­nom­yo­graphy (MMG), elec­tro­myo­graphy (EMG), ­heart ­rate (HR), and rat­ings of per­ceived exer­tion (RPE) ­versus ­power ­output ­during incre­mental ­cycle ergom­etry.
­Methods. ­Nine ­adult ­males [­mean (±SD) age 23 (±3) ­years] vol­un­teered to per­form an incre­mental ­test to exhaus­tion on a ­cycle ergom­eter. The MMG, EMG, HR, and RPE ­values ­were ­recorded at the end of ­each ­power ­output.
­Results. The nor­mal­ized (­expressed as a per­centage of max­imal ­values) rela­tion­ships for MMG, HR, and RPE ­versus ­power ­output ­were ­linear, ­while the EMG ­versus ­power ­output rela­tion­ship was quad­ratic. Fur­ther­more, ­there ­were no sig­nif­i­cant (p > 0.10) dif­fer­ences ­between ­slope coef­fi­cients for the rela­tion­ships ­among MMG, HR, and RPE ­versus ­power ­output.
Con­clu­sions. The ­results of ­this inves­ti­ga­tion indi­cated ­that ­there ­were ­close asso­ci­a­tions ­among the mechan­ical (MMG), car­diac (HR), and per­cep­tion of ­effort (RPE) ­aspects of ­cycle ergom­etry. In addi­tion, ­there was a dis­so­ci­a­tion ­between the ­linear MMG pat­tern and quad­ratic EMG pat­tern ­with ­increasing ­power out­puts.

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