Effect of increasing workload on knee extensor and flexor muscular activity during cycling as measured with intramuscular electromyography

The purpose of this study was to describe the effect of increasing workload on individual thigh muscle activation during a 20 minute incremental cycling test. Intramuscular electromyographic signals were recorded from the knee extensors rectus femoris, vastus lateralis, vastus medialis and vastus in...

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Bibliographic Details
Published in:PloS one 2018-08, Vol.13 (8), p.e0201014-e0201014
Main Authors: da Silva, Julio Cézar Lima, Ekblom, Maria M, Tarassova, Olga, Andersson, Eva, Rönquist, Gustaf, Grundström, Helene, Arndt, Anton
Format: Article
Language:English
Subjects:
Activation
Adult
Analysis
Athletes
Bicycling
Bicycling - physiology
Biology and Life Sciences
Cycles
Cyclists
Electrodes
Electromyography
Exercise
Fatigue
Flexors
Hamstring muscles
Health aspects
Health sciences
Heart Rate
Humans
Knee
Male
Medicin och hälsovetenskap
Medicin/Teknik
Medicine and Health Sciences
Medicine/Technology
Muscle contraction
Muscle, Skeletal - physiology
Muscles
Neurosciences
Physiological aspects
Research and Analysis Methods
Sports training
Studies
Thigh
Thigh muscles
Working conditions
Workload
Workloads
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Summary:The purpose of this study was to describe the effect of increasing workload on individual thigh muscle activation during a 20 minute incremental cycling test. Intramuscular electromyographic signals were recorded from the knee extensors rectus femoris, vastus lateralis, vastus medialis and vastus intermedius and the knee flexors semimembranosus, semitendinosus, and the short and long heads of the biceps femoris during increasing workloads. Mean activation levels were compared over the whole pedaling cycle and the crank angles at which onset and offset of activation and peak activity occurred were identified for each muscle. These data were compared between three workloads. EMG activation level significantly increased (p
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0201014