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MEDICINA DELLO SPORT
A Journal on Sports Medicine
Official Journal of the Italian Sports Medicine Federation
Indexed/Abstracted in: BIOSIS Previews, EMBASE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 0,163
Medicina dello Sport 2015 June;68(2):269-78
language: English, Italian
Activity-related changes in proprioceptor accuracy in active and non-active girls from 7 to 14 years
Zarandi Z., Asghar Norasteh A.
Department of Pathology and Corrective Exercise, Physical Education, University of Guilan, Faculty of Physical Education, Guilan, Iran
AIM: Development is a complex and continuous process that leads to an organized practical and special capacity. Purposes of this study were: 1) to compare force sense in childhood and prepuberty and puberty; 2) to evaluate the effects of physical activity on force sense in children and adolescent.
METHODS: This cross-sectional study encompassed 135 children divided in six groups (active-child, N.=15; non-active-child, N.=30; active-prepubertal, N.=15; non-active-prepubertal, N.=30; active-pubertal, N.=15; non-active- pubertal, N.=30). Force sense evaluated through reproduction of main strength (50% of maximum isometric voluntary contraction) using a dynamometer. All data was analyzed using two-way analysis of variance.
RESULTS: Comparing to non-active counterparts, active subjects showed lower absolute angular errors, but there is no significant differences (P>0.05). The results showed there is a signiﬁcant main effect for groups in strength absolute errors (P=0.018). No significant main effect observed for activity and groups in strength relative errors (P>0.05). The results demonstrated that there is a significant difference between prepuberty and puberty groups in strength absolute errors. One possible mechanism might arise through an altered sensibility of muscle sensory receptors, with different levels of muscle contraction in puberty group regarding to increase in maximum isometric voluntary contraction results from growth spurt.
CONCLUSION: Further investigation on the subject would be necessary, according to the importance of proprioception in motor control and gait in early life and differences in properioception and force sense results.