A comparison of the oxygen cost of locomotion in children with and without developmental coordination disorder

L.C. Chia · Kym J. Guelfi · Melissa K. Licari

50 citations0/0 files storedDevelopmental Medicine & Child Neurology

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Children's Physical and Motor Development Cardiovascular and exercise physiology Cerebral Palsy and Movement Disorders

Abstract

AIM: The aim of this study was to compare the oxygen cost (V(O2)) of walking and running, as well as aerobic fitness, in children with and without developmental coordination disorder (DCD). METHOD: Thirty-one males (17 with DCD and 14 in a comparison group; mean age 8 y 7 mo, SD 1 y 3 mo and 8 y 5 mo, SD 1 y 2 mo respectively) were tested on two separate occasions at least 1 week apart. On the first visit, motor proficiency was assessed by the McCarron Assessment of Neuromuscular Development instrument, which was followed by the determination of maximal aerobic capacity (V(O2max)). The second visit involved 4-minute bouts of treadmill walking (at 4.3 km/h and 5.8 km/h) and running (at 7.8 km/h and 8.4 km/h). Oxygen consumption, heart rate, respiratory exchange ratio, rating of perceived exertion (RPE), step rate, and qualitative assessment of locomotion were obtained for each speed. RESULTS: Despite poorer locomotion proficiency, there was no significant difference in the oxygen cost of walking or running between males with and without DCD. However, the DCD group had significantly higher RPE while running at 7.8 km/h (p=0.011) and had greater difficulty achieving V(O2max), resulting in significantly lower scores for aerobic fitness. INTERPRETATION: The differences in locomotion proficiency between children with and without DCD are not large enough to affect the oxygen cost of locomotion. However, children with DCD are more likely to withdraw from exercising at higher intensities before achieving peak performance.

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References

2009Diagnostic and Statistical Manual of Mental Disorders 2001Psychosocial implications of poor motor coordination in children and adolescents 2002Life span motor development 2005Developmental Coordination Disorder, Generalized Self-Efficacy Toward Physical Activity, and Participation in Organized and Free Play Activities 2008The relationship between physical fitness and motor competence in children 2007Changes in motor skill and fitness measures among children with high and low motor competence: A five-year longitudinal study 2008Physical fitness and health indices in children, adolescents and adults with high or low motor competence 2006Physical fitness differences in children with and without motor learning difficulties

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2014Exercise can improve physical self perceptions in adolescents with low motor competence 2018Health-related Fitness in Preschool Children with and without Motor Delays 2012Health-Related Physical Fitness in Dutch Children With Developmental Coordination Disorder 2012A comparison of running kinematics and kinetics in children with and without developmental coordination disorder

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