Online citations, reference lists, and bibliographies.

The Relationship Between Voluntary Electromyogram, Endurance Time And Intensity Of Effort In Isometric Handgrip Exercise

W. West, A. Hicks, L. Clements, Joshua L. Dowling
Published 1995 · Medicine
Cite This
Download PDF
Analyze on Scholarcy
The relationship between relative force, electromyogram (EMG) and time to fatigue was examined in seven male and seven female subjects [mean (SD) age, 21.7 (3.2) years] during isometric handgrip exercise. Subjects performed sustained submaximal contractions of the right handgrip at three different intensities: 30%, 50%, and 75% of the pretrial maximum voluntary contraction (MVC). EMG was sampled in 1-s epochs every 15 s during the contractions, and the integrated EMG (IEMG) values were then normalized to that of the pretrial MVC. As expected, time to fatigue was longest at 30% MVC and shortest at 75% MVC, but women performed consistently longer than men at each of the three intensities [woman vs men; 400.7 (35.8) vs 364.3 (34.4) s, 205.1 (15.6) vs 139.4 (13) s, and 89.9 (11.4) vs 66.4 (6.4) s, for 30%, 50%, and 75% MVC, respectively; P < 0.05)]. IEMG increased in a non-linear fashion over time during each trial, with the magnitude of IEMG being proportional to the intensity of the contraction. At the endurance limit, IEMG was greatest in the 75% MVC trial, however, no IEMG values reached those obtained in the related MVC [30%, 57.2 (6.9)%; 50%, 84.6 (5.7)%; 75%, 92.8 (7.4)%]. In conclusion, endurance time during sustained submaximal isometric handgrip exercise is dependent up on the intensity of the effort, with women having significantly larger endurance times than men. The related increase in IEMG is also proportional to the intensity of effort, however, the factors causing force to fail prior to the final IEMG reaching its predicted maximum remain to be elucidated.
This paper references
Voluntary strength and fatigue.
P. A. Merton (1954)
Impairment of neuromuscular propagation during human fatiguing contractions at submaximal forces.
Andrew J. Fuglevand (1993)
Detecting submaximal efforts in grip strength testing with the coefficient of variation
Michael Edward Robinson (1993)
Muscle membrane excitation and impulse propagation velocity are reduced during muscle fatigue.
H. S. Milner-Brown (1986)
Electromyography of fatigue.
G. Clinton Knowlton (1951)
Discharge characteristics of motor units and the surface EMG during fatiguing isometric contractions at submaximal tensions.
Jerrold Scott Petrofsky (1985)
The effects of muscle fatigue on small diameter muscle afferents in the anesthetized cat (abstract)
L Hayward (1988)
Reflex inhibition of human soleus muscle during fatigue.
S Jayne Garland (1990)
Detecting sincerity of effort when measuring grip strength.
Brian Niebuhr (1987)
Role of small diameter afferents in reflex inhibition during human muscle fatigue.
S Jayne Garland (1991)
Extent of motor unit activation during effort.
A Y Bélanger (1981)
Fatigue of intermittent submaximal voluntary contractions: central and peripheral factors.
B. Bigland-ritchie (1986)
The afferent influence on the voluntary firing range of individual motor units in man.
Jan Hannerz (1979)
Electromyographic manifestations of muscular fatigue.
Toshio Moritani (1982)
Some Central and Peripheral Factors Affecting Human Motoneuronal Output in Neuromuscular Fatigue
Simon C. Gandevia (1992)
Electromyographic study of local and generalized muscular impairment.
Robert G. Eason (1960)
Reliability and validity of grip and pinch strength evaluations.
Virgil G Mathiowetz (1984)
Amplitude of the surface electromyogram during fatiguing isometric contractions.
Alexander Lind (1979)
Central nervous changes in fatigue induced by local work
B Maton (1991)

This paper is referenced by
Acid-sensing ion channels 1a (ASIC1a) inhibit neuromuscular transmission in female mice
Francisco J Urbano (2014)
Gender differences in the fatigability of human skeletal muscle.
John G Semmler (1999)
Gender differences in skeletal muscle fatigability are related to contraction type and EMG spectral compression.
Brian C. Clark (2003)
Performance Fatigability: Mechanisms and Task Specificity.
Sandra K Hunter (2018)
Decreased muscle endurance associated with diabetic neuropathy may be attributed partially to neuromuscular transmission failure.
Matti D Allen (2015)
Task and sex differences in muscle oxygenation during handgrip fatigue development
Whitney P Mantooth (2018)
Muscle growth across a variety of exercise modalities and intensities: Contributions of mechanical and metabolic stimuli.
Hayao Ozaki (2016)
Muscle Fatigue in Males and Females during Multiple-Sprint Exercise
François Billaut (2009)
The relationship between plasma potassium, muscle membrane excitability and force following quadriceps fatigue
W. West (2009)
Assessment of accuracy and repeatability of verbal exertion estimation in the presence of fatigue
Matthew Klosner (2007)
Neuromuscular fatigue, muscle temperature and hypoxia: an integrative approach.
Alex Lloyd (2016)
Sex differences in muscle fatigability and activation patterns of the human quadriceps femoris
Brian C. Clark (2004)
Study of EMG Differences in Coordinate Movement of Waist and Abdomen Muscles
Xiangxin Meng (2013)
Getting a Grip on the Handgrip Task: Handgrip Duration Correlates with Neuroticism But Not Conscientiousness
Simon B. Goldberg (2017)
Scapula kinematic alterations following a modified push-up plus task.
John D. Borstad (2009)
in humanstime of a submaximal isometric contraction Changes in muscle activation can prolong the
Sandra K Hunter (2015)
Inducing hypertrophic effects of type I skeletal muscle fibers: A hypothetical role of time under load in resistance training aimed at muscular hypertrophy.
Jozo Grgic (2018)
compressionto contraction type and EMG spectral Gender differences in skeletal muscle fatigability are
Brian C. Clark (2015)
La evaluación de los movimientos repetidos en miembro superior El método OCRA
Juan Alberto Castillo (2017)
The influence of job rotation and task order on muscle responses in females
Kristen D. Dickhout (2018)
Sex differences in human fatigability: mechanisms and insight to physiological responses.
Sandra K Hunter (2014)
A Study of the Influence of Muscle Type and Muscle Force Level on Individual Frequency Bands of the EMG Power Spectrum
Paweł Bartuzi (2007)
Effects of competition on endurance performance and the underlying psychological and physiological mechanisms
Andrew Cooke (2011)
Study of stability of time-domain features for electromyographic pattern recognition
Dennis Tkach (2009)
Forearm blood flow follows work rate during submaximal dynamic forearm exercise independent of sex.
Joaquin U Gonzales (2007)
Heart rate variability (HRV) and muscular system activity (EMG) in cases of crash threat during simulated driving of a passenger car
Krystyna Zużewicz (2013)
Muscle endurance measurement using a progressive workload and a constant workload by maximal voluntary contraction
Shinichi Demura (2010)
Effects of Head-Supported Devices on Female Aviators during Simulated Helicopter Missions
Nabih M. Alem (1998)
Persistent multifocal conduction block in vasculitic neuropathy with IgM anti-gangliosides.
Francesca Notturno (2007)
Sex-Specific Metabolic Response to High-Intensity Intermittent Sprint Work
Kaitlyn J. Kielsmeier (2015)
Forearm blood flow responses to fatiguing isometric contractions in women and men.
Benjamin C. Thompson (2007)
Intensity-dependent EMG response for the biceps brachii during sustained maximal and submaximal isometric contractions
Joshua C Carr (2016)
See more
Semantic Scholar Logo Some data provided by SemanticScholar