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Test–retest reliability of the electromyographic fatigue threshold for cycle ergometry
Author(s) -
MahmutoviĆ Selim,
Sprout Erick Y.,
Fontaine John C.,
Buskirk Travis M.,
Galen Sujay S.,
Malek Moh H.
Publication year - 2016
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.24915
Subject(s) - intraclass correlation , cycle ergometer , reliability (semiconductor) , physical therapy , confidence interval , linear regression , physical medicine and rehabilitation , medicine , electromyography , coefficient of variation , mathematics , statistics , power (physics) , reproducibility , heart rate , blood pressure , physics , quantum mechanics
: The purpose of this study was to determine the intersession reliability of the electromyographic fatigue threshold (EMG FT ) for cycle ergometry. Methods : On separate occasions, 10 healthy, college‐aged men performed an incremental test to voluntary exhaustion on a cycle ergometer. The EMG amplitude vs. time relationships for each power output from the quadriceps femoris muscles were analyzed using linear regression. EMG FT was defined operationally as the average of the highest power output that resulted in a non‐significant slope coefficient ( P > 0.05) and the lowest power output that resulted in a significant ( P < 0.05) positive slope coefficient. The EMG FT values for trials 1 and 2 were used to calculate the intraclass correlation coefficient (ICC). Results : Overall, the reliability of the EMG FT (ICC 2,1 = 0.85; 95% confidence interval 0.49–0.96) was in the “excellent” category. Conclusions : The EMG FT for cycle ergometry is a reliable measure for assessing muscular fatigue. Muscle Nerve 53 : 803–807, 2016