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《北京残奥会总结报告》首次独立成卷向国际残奥委会提交,这在残奥运动发展历史上具有重要的里程碑意义。《北京残奥会总结报告》得到了国际残奥委会的充分认可和高度评价。为了弘扬奥运精神、继承残奥遗产、推动我国残疾人体育事业不断发展,创作组全面分析该报告创作的背景和意义,扼要叙述创作的过程和报告的框架,深刻总结创作的经验与体会,明确提出相关的思考与建议。 相似文献
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We investigated the rotational effect of buoyant force around the body’s transverse axis, termed buoyant torque, during a 200m front crawl maximal swim. Eleven male swimmers of national or international level participated. One stroke cycle (SC) for each 50m was recorded with two above and four below water cameras. The following variables were analysed: swimming velocity; absolute and normalised buoyant force; minimum, average and maximum buoyant torque; SC and arm recovery times. The average value of buoyant torque was higher in the first 50m (14.2 ± 4.5Nm) than in the following 150m (9.3 ± 4.1Nm~10.9 ± 4.5Nm) and was directed to raise the legs and lower the head throughout the race. The change in its magnitude seemed to be linked to the shorter time spent proportionally in arm recovery (first 50m: 27.6% of SC time; next 150m: 23.3–24.4% of SC time). Most swimmers had periods of the SC where buoyant torque was directed to sink the legs, which accounted to 10% of SC time in the first 50m and about twice this duration in the next 150m. These periods were observed exclusively at some instances when the recovering arm had entered the water while the opposite arm was still underwater. 相似文献
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