PMID- 23810336
OWN - NLM
STAT- MEDLINE
DCOM- 20140530
LR  - 20131009
IS  - 1879-2219 (Electronic)
IS  - 0966-6362 (Linking)
VI  - 38
IP  - 4
DP  - 2013 Sep
TI  - Muscle fatigue during repetitive voluntary contractions: a comparison between 
      children with cerebral palsy, typically developing children and young healthy 
      adults.
PG  - 962-7
LID - S0966-6362(13)00234-8 [pii]
LID - 10.1016/j.gaitpost.2013.05.004 [doi]
AB  - AIM: To combine peak torque and EMG analyses to investigate the hypothesis that 
      1) children with cerebral palsy (CP) have lower muscle fatigability than 
      typically developing children (TD) and whether 2) muscle fatigue correlates with 
      muscle strength. METHODS: Seven CP children, eight TD children and ten young 
      healthy adults (YHA) performed an all-out fatigue test of 35 maximal concentric 
      knee extension and flexion contractions on an isokinetic dynamometer. Angular 
      velocity was set at 60 degrees /s. Peak torque (PT) was determined per repetition and 
      either normalized to bodyweight or maximum voluntary torque. Surface-EMG of 
      quadriceps and hamstring muscles was measured to obtain changes in median 
      frequency (EMG-mf) and smooth rectified EMG amplitude per contraction. RESULTS: 
      Decline in PT differed between all groups for extensors and flexors, where YHA 
      showed the largest decline and CP children the smallest decline over the course 
      of the test. YHA showed a larger decline in EMG-mf of all quadriceps and 
      hamstrings than TD and CP children, while TD children showed a larger decline in 
      EMG-mf of m.rectus femoris and m.vastus lateralis than CP children. 
      INTERPRETATION: Results confirm that children with CP show lower fatigability 
      than TD children and that the lower fatigability coincides with lower maximal 
      muscle strength.
CI  - Copyright (c) 2013 Elsevier B.V. All rights reserved.
FAU - Eken, M M
AU  - Eken MM
AD  - Department of Rehabilitation Medicine, MOVE Research Institute, VU University 
      Medical Centre, Amsterdam, The Netherlands; Department of Research and 
      Development, Rehabilitation Centre Heliomare, Wijk aan Zee, The Netherlands. 
      Electronic address: m.eken@vumc.nl.
FAU - Dallmeijer, A J
AU  - Dallmeijer AJ
FAU - Houdijk, H
AU  - Houdijk H
FAU - Doorenbosch, C A M
AU  - Doorenbosch CA
LA  - eng
PT  - Journal Article
DEP - 20130627
PL  - England
TA  - Gait Posture
JT  - Gait & posture
JID - 9416830
SB  - IM
MH  - Adolescent
MH  - Adult
MH  - Case-Control Studies
MH  - Cerebral Palsy/*physiopathology
MH  - Child
MH  - Child Development/physiology
MH  - Cross-Sectional Studies
MH  - Electromyography
MH  - Female
MH  - Humans
MH  - Knee Joint/physiology
MH  - Male
MH  - Muscle Contraction/*physiology
MH  - Muscle Development/physiology
MH  - Muscle Fatigue/*physiology
MH  - Muscle Strength/*physiology
MH  - Muscle Strength Dynamometer
MH  - Muscle, Skeletal/physiology/physiopathology
MH  - Quadriceps Muscle/physiology/*physiopathology
MH  - Thigh
MH  - Torque
MH  - Young Adult
OTO - NOTNLM
OT  - Cerebral palsy
OT  - Dynamometer
OT  - Electromyography
OT  - Muscle fatigue
OT  - Muscle strength
EDAT- 2013/07/03 06:00
MHDA- 2014/05/31 06:00
CRDT- 2013/07/02 06:00
PHST- 2012/11/29 00:00 [received]
PHST- 2013/05/03 00:00 [revised]
PHST- 2013/05/15 00:00 [accepted]
PHST- 2013/07/02 06:00 [entrez]
PHST- 2013/07/03 06:00 [pubmed]
PHST- 2014/05/31 06:00 [medline]
AID - S0966-6362(13)00234-8 [pii]
AID - 10.1016/j.gaitpost.2013.05.004 [doi]
PST - ppublish
SO  - Gait Posture. 2013 Sep;38(4):962-7. doi: 10.1016/j.gaitpost.2013.05.004. Epub 
      2013 Jun 27.