Online citations, reference lists, and bibliographies.

Reduced Neuromuscular Activity And Force Generation During Prolonged Cycling.

A. St. Clair Gibson, E. Schabort, T. Noakes
Published 2001 · Biology, Medicine

Cite This
Download PDF
Analyze on Scholarcy
Share
We examined neuromuscular activity during stochastic (variable intensity) 100-km cycling time trials (TT) and the effect of dietary carbohydrate manipulation. Seven endurance-trained cyclists performed two 100-km TT that included five 1-km and four 4-km high-intensity epochs (HIE) during which power output, electromyogram (EMG), and muscle glycogen data were analyzed. The mean power output of the 4-km HIE decreased significantly throughout the trial from 319 +/- 48 W for the first 4-km HIE to 278 +/- 39 W for the last 4-km HIE (P < 0.01). The mean integrated EMG (IEMG) activity during the first 4-km HIE was 16.4 +/- 9.8% of the value attained during the pretrial maximal voluntary contraction (MVC). IEMG decreased significantly throughout the trial, reaching 11.1 +/- 5.6% during the last 4-km HIE (P < 0.01). The study establishes that neuromuscular activity in peripheral skeletal muscle falls parallel with reduction in power output during bouts of high-intensity exercise. These changes occurred when <20% of available muscle was recruited and suggest the presence of a central neural governor that reduces the active muscle recruited during prolonged exercise.
This paper references
10.1111/j.1748-1716.1985.tb07663.x
Electromyographic activity related to aerobic and anaerobic threshold in ergometer bicycling.
J. Viitasalo (1985)
10.1249/00005768-197901130-00017
Policy statement regarding the use of human subjects and informed consent.
S. G. Park (1979)
10.1113/jphysiol.1996.sp021164
Supraspinal factors in human muscle fatigue: evidence for suboptimal output from the motor cortex.
S. Gandevia (1996)
10.1007/BF00609408
Neuromuscular fatigue during prolonged pedalling exercise at different pedalling rates
T. Takaishi (1994)
10.1123/ijsn.5.4.329
Effect of carbohydrate ingestion subsequent to carbohydrate supercompensation on endurance performance.
J. Kang (1995)
10.1152/JAPPL.1999.86.5.1745
Downregulation of Na+-K+-ATPase pumps in skeletal muscle with training in normobaric hypoxia.
H. Green (1999)
10.5555/uri:pii:0003999386903758
Muscles Alive—Their function revealed by electromyography (5th edition): by John V. Basmajian and Carlo J. Deluca. Hardcover. Price $45.00. 561 pages. Williams and Wilkins, PO Box 969, Waverly Press Lane, Easton, MD 21601
Herbert A Schoening (1986)
10.1152/JAPPL.1997.83.6.2073
Lower extremity muscle activation during horizontal and uphill running.
M. A. Sloniger (1997)
10.1007/s004210050140
Myoelectric evidence of peripheral muscle fatigue during exercise in severe hypoxia: some references to m. vastus lateralis myosin heavy chain composition
A. D. Taylor (1997)
10.1063/1.351680
Generation of Maxwell displacement current from spread monolayers containing azobenzene
M. Iwamoto (1992)
10.1002/(SICI)1097-4598(199706)20:6<710::AID-MUS8>3.0.CO;2-B
Depression of human electromyographic activity by fatigue of a synergistic muscle.
P. Sacco (1997)
Force-velocity curve for bicycle work. In: Biomechanics VI-A, edited by Asmussen E and Jorgenson K
G. Sjogaard (1978)
10.1152/JAPPL.2000.88.4.1284
Carbohydrate loading failed to improve 100-km cycling performance in a placebo-controlled trial.
L. Burke (2000)
10.1152/JAPPL.1999.87.3.1083
Muscle metabolism during prolonged exercise in humans: influence of carbohydrate availability.
G. McConell (1999)
10.1249/00005768-199205001-00728
Influence of carbohydrate loading on fuel substrate turnover and oxidation during prolonged exercise.
A. Bosch (1992)
10.1097/00005768-199805001-01734
A new reliable laboratory test of endurance performance for road cyclists.
E. Schabort (1998)
10.1055/s-2007-972849
Assessment of the reproducibility of performance testing on an air-braked cycle ergometer.
G. Palmer (1996)
MUSCLE ELECTROLYTES IN MAN DETERMINED BY NEUTRON ACTIVATION ANALYSIS ON NEEDLE BIOPSY SPECIMENS
J. Bergstrom (1962)
10.1111/j.1748-1716.1967.tb03720.x
Diet, muscle glycogen and physical performance.
J. Bergström (1967)
A physiologically based simulation of the electromyographic sig
M Lowery (1998)
A physiologically based simulation of the electromyographic signal
M Lowery (1998)
The role of capsaicin-sensitive muscle afferents in fatigueinduced modulation of the monosynaptic reflex in the rat
VE Pettorossi (1994)
10.1152/jappl.1993.74.6.2998
Carbohydrate feedings and exercise performance: effect of initial muscle glycogen concentration.
J. Widrick (1993)
10.1136/bjsm.33.3.178
Analysis of the aerobic-anaerobic transition in elite cyclists during incremental exercise with the use of electromyography.
A. Lucia (1999)
10.1016/S1050-6411(97)00010-2
Surface EMG signal processing during isometric contractions.
R. Merletti (1997)
Arbeitsfahigkeit , und Ermudung [Hypoglycemia, the ability to work and the onset of fatigue]
Eh Christensen (1939)
10.1152/jappl.1992.73.4.1340
Influence of graded dehydration on hyperthermia and cardiovascular drift during exercise.
S. Montain (1992)
10.1111/J.1469-7793.1999.599AC.X
The role of capsaicin-sensitive muscle afferents in fatigue-induced modulation of the monosynaptic reflex in the rat.
V. E. Pettorossi (1999)
10.1113/jphysiol.1990.sp018241
Reflex inhibition of human soleus muscle during fatigue.
S. Garland (1990)
10.1109/IEMBS.1996.647510
Estimating EMG spectral compression: comparison of four indices
L. Conte (1996)
Evidence for neuromuscular fatigue during R195 CENTRAL NEURAL FATIGUE DURING CYCLING cycling in warm humid conditions
D Kay (2001)
10.1249/00003677-198101000-00002
EMG/FORCE RELATIONS AND FATIGUE OF HUMAN VOLUNTARY CONTRACTIONS
B. Bigland-ritchie (1981)
10.1152/jappl.1986.61.1.165
Muscle glycogen utilization during prolonged strenuous exercise when fed carbohydrate.
E. Coyle (1986)
10.1113/jphysiol.1996.sp021163
Changes in motor cortical excitability during human muscle fatigue.
J. Taylor (1996)
10.1152/JN.1999.82.1.501
Motor unit substitution in long-duration contractions of the human trapezius muscle.
R. Westgaard (1999)
10.1007/s004210050180
Effects of 3 days of carbohydrate supplementation on muscle glycogen content and utilisation during a 1-h cycling performance
J. A. Hawley (1997)
10.1113/jphysiol.1992.sp019161
Elevated muscle glycogen and anaerobic energy production during exhaustive exercise in man.
J. Bangsbo (1992)
10.1249/00005768-198201000-00018
Suction applied to a muscle biopsy maximizes sample size.
W. J. Evans (1982)
10.1080/02640419208729920
Changes in force production, blood lactate and EMG activity in the 400-m sprint.
A. Nummela (1992)
Force-velocity curve for bicycle work
G Sjogaard (1978)
10.1152/jappl.1992.72.5.1631
Neurobiology of muscle fatigue.
R. Enoka (1992)
10.3109/00365517009046250
Muscle metabolites during submaximal and maximal exercise in man.
J. Karlsson (1970)
10.2165/00007256-199724020-00001
Carbohydrate-Loading and Exercise Performance
J. Hawley (1997)
A physiologically based simulation of the electromyographic signal
M Lowery (1998)
10.1046/j.1365-201X.1997.00167.x
The relationships between EMG and muscle morphology throughout sustained static knee extension at two submaximal force levels.
B. Gerdle (1997)
10.1046/j.1365-201X.1997.00168.x
Differential responses in intramuscular pressure and EMG fatigue indicators during low- vs. high-level isometric contractions to fatigue.
A. Crenshaw (1997)
10.1016/0013-4694(83)90132-3
Electromyographic and mechanical characteristics of human skeletal muscle during fatigue under voluntary and reflex conditions.
K. Häkkinen (1983)
10.1016/S1440-2440(99)80171-6
Mind, muscles and motoneurones.
S. Gandevia (1999)
10.1152/physrev.1994.74.1.49
Cellular mechanisms of muscle fatigue.
R. Fitts (1994)
10.1249/00005768-199410000-00016
Heart rate responses during a 4-d cycle stage race.
G. Palmer (1994)
10.1111/j.1748-1716.1939.tb01321.x
II. Hypoglykämie, Arbeitsfähigkeit und Ermüdung1
E. H. Christensen (1939)



This paper is referenced by
10.1007/s00424-003-1058-3
Glycerol hyperhydration fails to improve endurance performance and thermoregulation in humans in a warm humid environment
F. Marino (2003)
10.1007/s00421-007-0512-x
Effect of oral administration of sodium bicarbonate on surface EMG activity during repeated cycling sprints
R. Matsuura (2007)
10.1080/02640414.2014.925571
Knowledge of bout duration influences pacing strategies during small-sided games
J A Sampson (2015)
10.1136/bjsm.2008.056085
Self-paced exercise is less physically challenging than enforced constant pace exercise of the same intensity: influence of complex central metabolic control
P. Lander (2009)
10.1007/s00421-009-1300-6
Effect of performance level on pacing strategy during a 10-km running race
A. E. Lima-Silva (2009)
10.1016/j.neuroscience.2012.01.042
Chemical lesioning and glutamate administration reveal a major role for the nucleus tractus solitarius in the cardiac-somatic reflex in rats
Xuefen Liu (2012)
10.1519/JSC.0000000000001326
Similarities and Differences in Pacing Patterns in a 161-km and 101-km Ultra-Distance Road Race
Philip L S Tan (2016)
The psychophysiological regulation of pacing behaviour and performance during prolonged endurance exercise
Venhorst Andreas (2018)
10.2165/00007256-200333010-00005
Endurance Training and Performance in Runners
K. Berg (2003)
10.2114/JPA2.26.541
Electromyographic data do not support a progressive recruitment of muscle fibers during exercise exhibiting a VO2 slow component.
D. T. Cannon (2007)
10.1159/000151548
Thermoregulation, fatigue and exercise modality.
R. Tucker (2008)
10.1016/j.neulet.2005.01.048
Muscle coordination changes during intermittent cycling sprints
F. Billaut (2005)
10.1098/rsta.2010.0094
Influence of fatigue on the simulated relation between the amplitude of the surface electromyogram and muscle force
J. L. Dideriksen (2010)
Muscular & mechanical efficiency in cycling
Oliver Malcolm Blake (2011)
10.3390/SPORTS3040369
Physiological Responses Underlying the Perception of Effort during Moderate and Heavy Intensity Cycle Ergometry
Kristen C. Cochrane (2015)
10.1007/s00421-008-0674-1
The influence of fatigue-induced increase in relative work rate on temperature regulation during exercise
A. Kacin (2008)
10.1080/02640414.2011.552113
Markers of isometric training intensity and reductions in resting blood pressure
Gavin R. Devereux (2011)
10.1080/02640414.2013.835435
Energy management using virtual reality improves 2000-m rowing performance
Charles P. Hoffmann (2014)
10.1136/bjsm.2003.010330
From catastrophe to complexity: a novel model of integrative central neural regulation of effort and fatigue during exercise in humans: summary and conclusions
T. Noakes (2005)
10.3917/SM.052.0083
Étiologie et cinétique d'apparition de la fatigue neuromusculaire lors d'exercices prolongés de cyclisme
R. Lepers (2004)
10.1007/s00421-007-0565-x
VO2max during successive maximal efforts
C. Foster (2007)
Effect of knowledge of exercise duration on predicted, actual, and session leg muscle pain responses during cycle ergometry
Christina M. Ledezma (2010)
10.1007/s00421-008-0738-2
Neuromuscular fatigue is greater following highly variable versus constant intensity endurance cycling
J. Theurel (2008)
Kinematic And Electromyographic Analysis Of The Legs, Torso, And Arms During An Exhaustive Run.
J. Smoliga (2007)
Training intensity distribution, physiological adaptation and immune function in endurance athletes
Craig M. Neal (2011)
10.2165/00007256-200838030-00004
Describing and Understanding Pacing Strategies during Athletic Competition
C. Abbiss (2008)
10.1016/J.JSAMS.2007.03.006
Physiological and electromyographic responses during 40-km cycling time trial: relationship to muscle coordination and performance.
R. Bini (2008)
10.1249/MSS.0b013e3181c91f4e
Time course of neuromuscular changes during running in well-trained subjects.
E. Ross (2010)
10.1016/j.jelekin.2009.01.008
Interpretation of EMG integral or RMS and estimates of "neuromuscular efficiency" can be misleading in fatiguing contraction.
Todor I. Arabadzhiev (2010)
10.1139/apnm-2015-0144
Electromyographic, mechanomyographic, and metabolic responses during cycle ergometry at a constant rating of perceived exertion.
Kristen C. Cochrane (2015)
10.1055/s-0028-1104582
Influence of starting strategy on cycling time trial performance in the heat.
C. Abbiss (2009)
10.1136/bjsm.2003.010645
A signalling role for muscle glycogen in the regulation of pace during prolonged exercise
H. G. Rauch (2005)
See more
Semantic Scholar Logo Some data provided by SemanticScholar