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In this study,surface EMG signals from bilateral erector spine as well as kinematic variables of lumbar spine of 20 male adult subjects were recorded and analyzed synchronically during their performances of trunk flexion-extension with 7 different lift loads. The results showed that different lifting load has no effect on both inclination angle and flexion angle at the time of EMG-off or EMG-on ,and flexion relaxation phenomenon of erector spine either. With the increase of lifting load,the maximum low back moment,the low back moment at the time of EMG-off and that at the time of EMG-on be－
came significantly larger. In the load-sharing relationship,the passive tissue could not significantly get a compensation from muscular activation of erector spine,which is a highly risk situation of injury for passive tissues in low back area especially when lifting with a greater load. 相似文献
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具身认知理论强调认知与身体体验和学习环境融为一体,为高层次人才创新能力的培养路径提供了理论指引。着眼新时代行业产业、科技创新发展对高层次人才培养的需要,统筹研究生教育规模和教育质量双增长、双提高,化解高校研究生教育资源供给相对不足对食品学科研究生创新能力、学习体验的制约,文章从课程教学体系、科研创新环境、指导教师队伍、科教产教联盟四个方面构建食品学科研究生具身创新人才培养模式,营造良好的研究生教育、创新、发展新生态,为我国食品学科研究生教育内涵式发展,促进产业科技创新提供了新路径。 相似文献
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小组合作是重要的班级活动组织形式。相比于个体学习,小组合作学习更能激发学生的学习潜能,调动学生的学习积极性和主动性,通过学生之间的互助交流达到知识和经验共享的目的,同时对于学生的合作能力和科学精神产生正向的引导。基于初中化学学科,本文主要对小组合作方法的实践做了一些探索。希望此研究能够为广大化学教师提供一些借鉴和帮助,仅供参考。 相似文献
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