Status quo of online learning for undergraduates in Chongqing Medical University during the epidemic / 中华医学教育探索杂志

Objective:To investigate the online learning situation of students in Chongqing Medical University during the COVID-19 epidemic, analyze the advantages and disadvantages of online learning, and provide reference for the improvement of online teaching.Methods:Random sampling was adopted to conduct online questionnaire survey among undergraduates of Chongqing Medical University in the form of anonymous questionnaire. SPSS 22.0 was used for chi-square test.Results:There were significant differences in learning outcomes between students living in different places during the epidemic period ( P<0.05). The results showed that 34% of students thought the advantages of online learning were "freedom of learning time", "freedom of learning place", "abundant resources and available to watch videos repeatedly". According to the analysis of disadvantages of online learning, 39% of the students believed that online learning had "poor personal self-control ability to ensure learning efficiency", "no sense of reality in the experimental courses", "lack of learning atmosphere, decrease of the learning motivation", "tedious learning process, requiring constant software upgrading and replacement." Conclusion:Firstly, for special periods, we should unify online learning platforms in the whole university. Then, we should strengthen the publicity of online courses. Finally, teachers should drive the classroom atmosphere during the online teaching and improve students' learning efficiency.

Surface Electromyography Finding of Vastus Lateralis and Vastus Medialis during the Taijiquan Exercise / 中国康复理论与实践

@#Objective To investigate the characteristic of vastus lateralis (VL) and vastus medialis (VMO) during the Taijiquan exercise with surface electromyography (EMG). Methods 15 healthy adults were collected their median frequency (MF), mean power frequency (MPF), zero crossing rate (ZCR), averaged EMG (AEMG) of bilateral VL and VMO when they maintained 5 Taijiquan typical posture. Results The differences were not significant in all those indexes between VL and VMO during the postures of Baihe Liangchi and Jinji Duli, and were significant during the postures of Louxi Aobu, Shizi Tui, Pubu (P<0.05), the VL's indexes were less. Compared with the maximum voluntary contraction, Taijiquan was the lower loaded, and more slow muscle fibers could be recruited. Conclusion Taijiquan is a lower loaded exercise, and more slow muscle fibers can be recruited, especially in the VMO in some actions.