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Homma M Homma M 《Sports biomechanics / International Society of Biomechanics in Sports》2005,4(1):73-87
We investigated coaching points for the technique of the eggbeater kick in synchronized swimming. The movements of the eggbeater kick for six female synchronized swimmers, all the top-ranking members at the Olympics and World Championships, were analyzed by using three-dimensional motion analysis. By comparing the movements of higher eggbeater-skilled swimmers with lower eggbeater-skilled swimmers, the coaching points for techniques of the eggbeater kick in synchronized swimming are clarified as follows. First, to hold the knees as high and as near the water surface as possible and to keep the heels close to the hips. Secondly, to keep the knees as wide as possible. Thirdly, to kick sideways producing lift force, and not to kick downward. Fourthly, to pull up the heels to nearly the water surface at the out-kick, with strong internal rotation of the thighs. Lastly, to move the feet as if treading water, with strong dorsiflexion and plantar flexion and adduction of the foot; that is to move the feet like the motion of the hands when sculling. Moreover, the movements of higher eggbeater-skilled swimmers can be termed 'horizontal kick type' and the movements of lower eggbeater-skilled swimmers can be termed 'vertical kick type'. 相似文献
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Stroke phase discrimination in breaststroke swimming using a tri-axial acceleration sensor device 总被引：3，自引：1，他引：2
Yuji?OhgiEmail author Hiroshi?Ichikawa Masanobu?Homma Chikara?Miyaji 《Sports Engineering》2003,6(2):113-123
Our previous study has demonstrated that the swimmer’s wrist acceleration in the crawl stroke and the breaststroke had distinctive
characteristics between subjects (Ohgiet al. 2000). In addition, stroke phase discrimination could be achieved for the crawl stroke by using the swimmer’s wrist acceleration.
This study provides evidence that the swimmer’s tri-axial wrist acceleration could be used for stroke phase discrimination
in the breaststroke. Swimmers’ triaxial wrist accelerations were measured and their underwater stroke paths calculated. The
authors examined the characteristics of the wrist acceleration, such as a local maximum or minimum, with reference to the
swimmers’ stroke paths. As a result, it was suggested that the three phases of the breaststroke, the recovery, the insweep
and the outsweep, could be distinguished using thex-axis (ulnar-radial axis) and they-axis (distal-proximal axis) acceleration. This methodology allows us to identify which stroke phase would be changed in skill
training or over training, and the acceleration sensor device has the potential to become a precise stroke pedometer or stroke
monitoring tool in the near future. 相似文献
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The management of the Olympic Games has changed significantly since the 1984 Los Angeles Olympic Games. The introduction of commercialisation probably saved the Olympic Games from a fateful crisis. It brought financial stability and attracted cities to bid for the Games. On the other hand, the impact of hosting the Olympic Games increased as more stakeholders became involved in its management. In addition, the global community became concerned about environmental issues. Global organisations including the International Olympic Committee (IOC) were required to take actions towards sustainable development. In this context, the debate regarding the Olympic legacy became of interest among stakeholders and researchers. The IOC introduced indicators to measure impact and legacy, which is now referred to as Olympic Games Impact (OGI). However, there are some issues in the current OGI study. This paper aims to suggest a theoretical approach which would contribute to solve the issues by focusing on sustainable sport legacy as an example. The proposed theoretical approach is focusing on event objective and analysing the relationship between sport policy and sport legacy development concentrated on the process and opportunity rather than the outcome. 相似文献
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