Objective: To examine the effect of functional sports training on the development of spatial awareness in children aged 6-8 years old,to provide a reference to improve children s ability of spatial sense. Methods: A class of 125 children aged 6-8 years from first, second, and third grades of an elementary school in Zhengzhou City were conveniently selected by stratified random sampling, who were divided into the experimental group ( n =62) and the control group ( n =63) by random number tables. The experimental group received functional sports intervention for 8 weeks,3 times a week,20 min each time, and the control group received traditional sports game program. Results: After the intervention,the error values of depth perception, orientation perception, and space perception in the experimertal group of 6 and 7 year old children reduced by 1.98 cm, 2.88°, and 22.00 cm (6 year old children) and 1.61 cm, 2.34°, and 17.99 cm (7 year old children) compared with the control group, respectively. Compared with those in the control group of 8 year old after the intervention, and the differences were of statistical signifiance( t =-3.07, -2.94, -3.07 ; -3.25, -3.29, -3.15, P <0.01). There was no significant difference in the error values of depth perception, orientation perception and space perception between the experimental group and the control group after intervention ( P >0.05). In the experimental group, the error values of depth perception, orientation perception and space perception reduced by 2.30 cm, 3.88°, 28.05 cm (6 year old children), 2.16 cm, 2.15°, 17.45 cm (7 year old children) and 1.16 cm, 1.81°, 9.10 cm (8 year old children) in children aged 6-8 years after intervention, significant improvement were observed compared with before intervention ( t = 8.50 , 9.04, 7.35; 7.39, 10.30, 11.05; 4.67, 4.46, 14.14, P <0.01). Compared with before the intervention, children aged 6-8 in the control group only had significant differences in space perception( t =4.13, 6.71, 8.93, P <0.01). Conclusion Functional sports games can improve depth perception, orientation perception and spatial perception for children aged 6-8 years. It can be integrated into children s daily activities to play a positive role in promoting the healthy growth of children.

Ojective To explore the effect of the hydroxyapatite(HAp)and gelatin(Gel)coating on the healing of the polyethylene terephthalate(PET)artificial ligament.Methods The artificial ligaments were divided into a PET group with a pure PET surface and a PET/HAp/Gel group coated with HAp and Gel.Both coatings were observed using the scanning electron microscope(SEM).Forty-eight male New Zealand rabbits were randomly divided into two groups and underwent anterior cruciate ligament reconstruction,before two kinds of artificial ligaments were implanted respectively.Four weeks and 8 weeks after the operation,the rabbits were sacrificed,and histological hematoxylin and eosin (HE)staining as well as the biomechanical examination were performed.Results HAp/Gel coating was found depositing on the surface of PET artificial ligaments.Histological HE staining showed a thick fibrous connective tissue forming at the graft-host bone interface 4 weeks postoperatively,and the interface width of both groups were narrowed,with significantly more shrinking in the PET/HAp/Gel coating group.And new bone tissues were found in the interface of PET/HAp/Gel group 8 weeks after the operation.The biomechanical examination found significant differences in the failure load between the PET(46.16 ± 2.88 N) and PET/HAp/Gel group(71.32 ± 3.92 N)8 weeks after the surgery(P=0.0021).And 4 weeks and 8 weeks after the surgery,significant differences were found in the stiffness between the PET group and the PET/HAp/Gel group(11.06 ± 1.14 N/mm vs 16.20 ± 1.17 N/mm,P=0.0199;14.37 ± 0.88 N/mm vs 24.35 ± 1.35 N/mm,P=0.0008).Conclusion HAp/Gel coating can enhance the osteogenesis of PET artificial ligaments,promoting the new bone formation at the graft-host bone interface and herein strengthening the graft-host bone healing.