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921.
Measurement of ground reaction force (GRF) in running provides a direct indication of the loads to which the body is subjected
at each foot-ground contact, and can provide an objective explanation for performance outcomes. Traditionally, the collection
of three orthogonal component GRF data in running requires an athlete to complete a series of return loops along a laboratory
based runway, within which a force platform is embedded, in order to collect data from a discrete footfall. The major disadvantages
associated with this GRF data collection methodology include the inability to assess multiple consecutive foot contacts and
the fact that measurements are typically confined to the laboratory. The objective of this research was to investigate the
potential for wearable instrumentation to be employed, in conjunction with artificial neural network (ANN) and multiple linear
regression (MLR) models, for the estimation of GRF in middle distance running. A modular wearable data acquisition system
was developed to acquire in-shoe force (ISF) data. Matched data sets from wearable instrumentation (source data) and force
plate (target data) records were collected from elite middle-distance runners under controlled laboratory conditions for the
purposes of ANN and MLR model development (MD) and model validation (MV).
In terms of statistical measures of prediction accuracy the MLR model was found to provide a superior level of accuracy for
the prediction of the vertical and medio-lateral components of GRF and alternatively, the ANN model provided the most accurate
predictions of the anterior-posterior component of GRF. The prediction accuracy of each component of GRF was found to be governed
by the inherent signal variability, in which case the vertical and anterior-posterior components were more reliable and subsequently
predicted significantly more accurately than the medio-lateral component.
The emerging capability for obtaining continuous GRF records from wearable instrumentation has the potential to permit unprecedented
quantification of training stress and competition demands in running. 相似文献
922.
目前关于体育教学实习成绩的评定,各院校做法不一,还没有定论。但就目前各校的评估量表看,普遍较复杂,计算量大,指标多,内容不具体,因而不适用。而且对体育教学大都只重视一次公开课或检查课,对平时课堂教学不大重视。因此,制定出客观、全面、简便易行的评估指标体系就具有很重要的意义。 相似文献
923.
影响女大学生参与体育活动的因素分析 总被引:5,自引:3,他引:2
运用行为科学理论,通过对665名女大学生参与体育活动情况的调查,揭示了女大学生对待体育活动的认识和实践的状况,分析了影响女大学生参与体育活动的主、客观原因。 相似文献
924.
足球对抗的实质是相互间知行能力的竞争较量,足球对抗的知行特征为对抗中的知彼知己和避实击虚。 相似文献
925.
健美操运动在高校校园文化建设中的作用 总被引:3,自引:0,他引:3
贵永玲 《体育成人教育学刊》2003,19(4):56-57
健美操运动是一种新型体育运动项目,因其融体操、舞蹈、音乐为一体,以健身、健美和健心为目的,成为高校校园体育化的重要组成部分,同时也在丰富、完善校园化建设,促进大学生全面发展,完成高等教育培养目标方面发挥着重要作用。 相似文献
926.
Edwin P. Hubble 《Resonance》2009,14(3):303-306
Desiring to give those of our readers who may not have heard the broadcast the opportunity of reading so clear a statement
of such a large phase of astronomical research by so eminent an authority, we asked and were readily granted permission to
reprint the text. Possibly those who did hear the broadcast will, like ourselves, welcome the privilege of reading and studying
it at leisure. We therefore, present it here with much satisfaction. 相似文献
927.
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930.
Evolution of an end-user training program 总被引:1,自引:0,他引:1
The University of Illinois at Chicago Library of the Health Sciences has taught end-user classes on the MEDLARS system since early 1985. Registration, class composition, and, most importantly, class organization evolved continuously during the first year of operation. Several feedback mechanisms were used. An examination of the past training and specialization of participants helped to determine teaching examples and pace; a more varied group of participants necessitated a broader range of examples and increased explanations. Participant evaluation forms and oral comments helped define scheduling, agenda, and the need for additional equipment and practice time. Further evaluation will center on the searching done by the program's alumni. 相似文献