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TEGAN UPJOHN RENÉ TURCOTTE DAVID J. PEARSALL JONATHAN LOH 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):206-221
The objectives of the study were to describe lower limb kinematics in three dimensions during the forward skating stride in hockey players and to contrast skating techniques between low- and high-calibre skaters. Participant motions were recorded with four synchronized digital video cameras while wearing reflective marker triads on the thighs, shanks, and skates. Participants skated on a specialized treadmill with a polyethylene slat bed at a self-selected speed for 1 min. Each participant completed three 1-min skating trials separated by 5 min of rest. Joint and limb segment angles were calculated within the local (anatomical) and global reference planes. Similar gross movement patterns and stride rates were observed; however, high-calibre participants showed a greater range and rate of joint motion in both the sagittal and frontal planes, contributing to greater stride length for high-calibre players. Furthermore, consequent postural differences led to greater lateral excursion during the power stroke in high-calibre skaters. In conclusion, specific kinematic differences in both joint and limb segment angle movement patterns were observed between low- and high-calibre skaters. 相似文献
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DAVID W. JARDINE 《Journal of Philosophy of Education》1994,28(1):17-24
This paper is an interpretive exploration of the figure of the monstrous child as it appears in the experiences of student-teachers entering the community of teaching. It also considers how interpretive work is itself haunted by this figure and how, therefore, teaching itself might be considered an interpretive activity. 相似文献
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