Document Detail


Head size and motor performance in children born prematurely.
MedLine Citation:
PMID:  12783038     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: The objective of this study was to determine the relationship between head circumference (HC) and motor performance in 6- to 12-yr-old children born prematurely (PRE: birthweight < or = 1500 g, gestational age < or = 32 wk) and in children born at term (CON). METHODS: Thirty-three PRE and 21 CON without an apparent neurological deficit participated in this study. HC was measured on the day of testing and was rated as small HC (SHC, HC more than 1 SD below the 50th percentile of reference data) or as normal HC (NHC). Subjects were examined by an experienced neuropediatrician, and whole-body coordination was assessed by the Körper-Koordinationstest für Kinder (KTK). Peak exercise performance was determined by a Wingate test and an incremental cycling test to volitional fatigue. Net oxygen cost of cycling was measured during four different tasks lasting 5-7 min each. Subjects pedaled at an intensity corresponding to 30% and 60% of peak oxygen uptake ([OV0312]O(2peak)) at a cadence of 36 and 76 rpm, respectively. RESULTS: Prematures with SHC showed no statistically significant difference in their neurological examination and whole-body coordination compared with prematures with NHC. Wingate test performance and [OV0312]O(2peak) relative to body mass were similar among SHC, NHC, and CON. In SHC, but not in NHC and CON, net oxygen cost of cycling increased significantly (P < 0.05) when cadence was increased from 36 to 76 rpm. CONCLUSION: At the age of 6-12 yr, SHC have a higher oxygen cost of cycling in exercise tasks requiring high velocity, which might be explained-at least in part-by an impaired neural control of intra- and intermuscular coordination.
Authors:
Helge Hebestreit; Waltraud Schrank; Lothar Schrod; Han-Michael Strassburg; Susi Kriemler
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  35     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2003 Jun 
Date Detail:
Created Date:  2003-06-03     Completed Date:  2003-09-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  914-22     Citation Subset:  IM; S    
Affiliation:
Universitäts-Kinderklinik, Würzburg, Germany. Hebestreit@mail.uni-wuerzburg.de
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MeSH Terms
Descriptor/Qualifier:
Biomechanics
Cephalometry
Child
Exercise Test
Fatigue
Female
Follow-Up Studies
Head / anatomy & histology*
Humans
Infant, Newborn
Infant, Premature*
Male
Motor Skills*
Oxygen Consumption*
Physical Fitness

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


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