Symmetrical and Asymmetrical motor control in children : Bipedal and unipedal hopping

Abstract The purpose of this study was to compare the temporal and kinetic features of symmetrical and asymmetrical hopping in children of different ages. If the two hopping tasks become increasingly similar with age then one might hypothesise convergence of coordinative structures for repetitive hopping, encompassing unipedal and bipedal modes. Four groups of female children ( N = 35), aged from 3.5 years to 9.5 years, were recruited. Temporal and kinetic variables were extracted from the ground reaction forces collected on a force plate sampling at 300 Hz. An Age × Task (repeated) ANOVA revealed a significant difference in unipedal and bipedal hopping in all timing and kinetic variables. Age groups differed in frequency, air duration, ground/air ratios and weight-normalised vertical impulses. Although task differences in kinetic parameters remained across age, some temporal variables became more alike. The temporal data appeared to provide tentative support for the hypothesis of convergence.

[1]  Bryant J. Cratty,et al.  Perceptual and Motor Development in Infants and Children , 1970 .

[2]  J Whitall,et al.  A developmental study of the interlimb coordination in running and galloping. , 1989, Journal of motor behavior.

[3]  Stability and change in children's skill , 1993, Psychological research.

[4]  H. Prechtl.  Development of Postural Control in Infancy , 1989 .

[5]  D. L. Gallahue.  Understanding motor development in children , 1982 .

[6]  E. Thelen.  Rhythmical stereotypies in normal human infants , 1979, Animal Behaviour.

[7]  J. Larkin.  Kinematic profiles of the hands in a bimanual task : a study in movement asymmetry , 1986 .

[8]  Basmajian Jv,et al.  Motor learning and control: a working hypothesis. , 1977 .

[9]  J R Lackner,et al.  Perception of body weight and body mass at twice earth-gravity acceleration levels. , 1984, Brain : a journal of neurology.

[10]  Peter H. Greene,et al.  Problems of Organization of Motor Systems , 1972 .

[11]  N. A. Bernshteĭn.  The co-ordination and regulation of movements , 1967 .

[12]  D. Sugden,et al.  Movement Skill Development , 1985 .

[13]  Peggy A. Rosenkranz.  Perceptual-Motor Development , 1974 .

[14]  Esther Thelen,et al.  Constraints on multi-joint movements: From the spontaneity of infancy to the skill of adults: Reaction to G.J. van Ingen Schenau (1989) , 1989 .

[15]  M. Roberton,et al.  Developing children--their changing movement , 1984 .

[16]  L. E. Halverson,et al.  Developmental Sequences for Hopping over Distance: A Prelongitudinal Screening , 1985 .

[17]  K. Haywood.  Life Span Motor Development , 1986 .

[18]  R. Wickstrom.  Fundamental motor patterns , 1970 .

[19]  E. Thelen,et al.  An ‘Outside-in’ Approach to the Development of Leg Movement Patterns , 1989 .