Document Detail


Comparison of electromyography fatigue threshold in lower limb muscles in trained cyclists and untrained non-cyclists.
MedLine Citation:
PMID:  20552949     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to identify and compare the Electromyographic Fatigue Threshold (EMG(FT)) determined in the Vastus Lateralis (VL), Rectus Femoris (RF), Biceps Femoris (BF), Semitendinosus (ST) and Tibialis Anterior (TA) during stationary cycling in trained cyclists and non-cyclists. Using a cycle ergometer, 13 cyclists (28.4 +/- 6.9 years; 70.3 +/- 13 kg; 176.1 +/- 8.5 cm) and 11 non-cyclists (25.8 +/- 4 years; 73 +/- 9.1 kg; 175 +/- 6.4 cm), performed a maximum incremental test (ITmax) (90 rpm) to determine the (EMG(FT)). Maximal power output (W(PEAK)) reached by cyclists was higher than for non-cyclists (372.6 W and 248.9 W respectively) (P < 0.01). For the five muscles analyzed in cyclists, EMG(FT) occurred at 85.7% of cases in the VL, 92.9% in RE 78.6% in BE 78.6% in ST and 50% in TA, while in the non-cyclists group, this occurrence was 100% to muscle VL, 100% to RF, 92.6% to BF, 78.6% to ST, and 78.6% to TA. Analyzing the percentage corresponding to the power at EMG(FT) in relation to W(PEAK) reached, no differences between groups were observed for RF, BF and ST, however VL and TA, as well as the mean from all muscles were lower for cyclists than non-cyclists (P < 0.05). The present results showed that EMG(FT) is more easily identified in RF and VL muscles for both groups, and it may be an interesting method to evaluate the adaptive responses from aerobic and anaerobic metabolisms during cycling training programs.
Authors:
B P C Smirmaul; J L Dantas; E B Fontes; L R Altimari; A H Okano; A C Moraes
Related Documents :
25027609 - Detection of anaplasma platys in dogs and rhipicephalus sanguineus group ticks by a qua...
17537909 - Neural control of superficial and deep neck muscles in humans.
3670719 - Motor activity and visually induced postural reactions during two-g and zero-g phases o...
11166609 - Median frequency of the electromyographic signal: effect of time-window location on bri...
11441039 - Twisting and bending: the functional role of salamander lateral hypaxial musculature du...
2752059 - Emg muscle scanning: stability of hand-held surface electrodes.
6383379 - Stimulation of prostacyclin synthesis by thromboxane a2-like prostaglandin endoperoxide...
19795759 - Mode of attachment of a polyopisthocotylean parasite, metamicrocotyla cephalusto the gi...
8836069 - Medial epicondylectomy or ulnar-nerve transposition for ulnar neuropathy at the elbow?
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Electromyography and clinical neurophysiology     Volume:  50     ISSN:  0301-150X     ISO Abbreviation:  Electromyogr Clin Neurophysiol     Publication Date:    2010 Apr-Jun
Date Detail:
Created Date:  2010-06-17     Completed Date:  2010-08-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0327533     Medline TA:  Electromyogr Clin Neurophysiol     Country:  Belgium    
Other Details:
Languages:  eng     Pagination:  149-54     Citation Subset:  IM    
Affiliation:
University of Campinas--UNICAMP, SP, Brazil. brunosmirmaul@gmail.com
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Bicycling / physiology*
Electromyography*
Exercise Test
Humans
Leg / physiology*
Muscle Fatigue / physiology*
Physical Endurance / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Study of change in brain activity due to blood flow while playing Shogi (Japanese chess).
Next Document:  Cure of urinary bladder functions in severe (95%) motoric complete cervical spinal cord injury in hu...