Influence of obesity and gender on the dynamic and static balance in children aged 8-10 years

Objective To explore characteristics of dynamic and static balance of children aged 8 to 10 years, and to provide a reference for prevention of injuries caused by physical activities among obese children and the choice of facilities for physical activities. Methods Totally 100 obese children and 100 normal children were selected as the subjects by one-legged jumps from 5 primary schools in economic and technological development district of Hefei, the proportion of male and female children was 1 : 1 in each group. IIM-BAL-100 balance tester was used to assess the static balance ability under double feet standing with eyes closed and right foot standing with eyes opened. The dynamic balance of double feet standing with eyes opened was measured by the Balance-check dynamic balance tester. Two-factor analysis of variance (ANOVA) was used to examine the effect of obesity and gender on the dynamic and the static balance. Results In the static balance ability, when standing with both eyes closed, there was no significant difference in all static balance values between groups, genders and the interaction between the two factors ( F = 2. 33, 0.42, 0.76, P>0.05). When standing on one foot with eyes opened, there was significant difference in the static equilibrium index between the groups and the gender ( F = 2.72, 3.07, P<0.05). In terms of dynamic balance ability, all the dynamic balance indexes had statistically significant differences among the groups ( F = 43.67, P<0.01). Conclusion Obesity can significantly reduce the ability of single-leg static balance and dynamic balance in 8-10-year-old children. Sex can significantly affect the single foot static balance ability of 8—10-year-old children, but it has little effect on the dynamic balance ability of 8-10-year-old children. 【摘要】 目的 探讨不同性别肥胖儿童静动态平衡能力特点, 为肥胖儿童运动损伤的预防以及运动选材提供理论依据。 方法 通过单腿前跳法与年龄分层抽样法, 从合肥市经开区5所小学选取100名8~10岁肥胖儿童及100名正常体重儿童 为研究对象, 每组儿童男、女比例均为1 : 1。采用IIM-BAL-100型静态平衡测试仪分别测试闭眼双足和睁眼单足站立状 态下受试者各平衡指标的值, 采用Balance-check动态平衡测试仪测试睁眼双足站立状态下的动态平衡能力。使用双因素 方差分析检验肥胖和性别对静动态平衡能力的影响。 结果 在静态平衡能力方面, 当闭眼双足站立时, 所有静态平衡指标 值在肥胖、性别以及两因素交互作用间的差异均无统计学意义( F值分别为2.33,0.42,0.76, P 值均>0.05); 当睁眼单足站 立时, 各静态平衡指标值在是否肥胖和性别间的差异均有统计学意义( F值分别为2.72,3.07, P 值均<0.05)。在动态平衡 能力方面, 所有动态平衡指标值在是否肥胖间的差异有统计学意义( F = 43.67, P<0.01)。 结论 8~10岁肥胖儿童的单足 静态平衡能力和动态平衡能力弱于正常体重儿童;8~10岁男童的单足静态平衡能力弱于女童。