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941.
In this study, we examined the relationship between anthropometric, strength and power characteristics of rugby forwards, their body position when scrummaging, and their ability to apply force when scrummaging. Force applied to an instrumented scrum machine was measured for 56 players, both individually and as scrum packs. Measurements of body position for individuals were made by digitizing videotape records of the trials. Forty players subsequently had their anthropometry assessed and completed several strength and power tests. Body mass, each component of somatotype, maximal anaerobic power developed on a cycle ergometer, and isokinetic knee extension strength correlated significantly with individual scrummaging force. A regression model (P < 0.001) including body mass, mesomorphy, maximal anaerobic power and hip angle while in the scrummaging position accounted for 45% of the variance in individual scrummaging force. The packs that produced the largest scrummaging forces were, in general, characterized by a greater pack force to sum of individual force ratio than the packs producing lower forces. Our results emphasize the need for a scrum pack to develop technique and coordination as a unit to maximize scrummaging force. 相似文献
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J. Avenhaus R. Gotzhein T. H?rder L. Litz K. Madlener J. Nehmer M. Richter N. Ritter D. Rombach B. Schürmann und G. Zimmermann 《Informatik - Forschung und Entwicklung》1998,13(4):227-234
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944.
This article is an edited and condensed version of the report of a study carried out under the auspices of the Joint Information Systems Committee (JISC) and the Publishers Association (PA). It develops the conclusions of an earlier analysis (Bide, Oppenheim & Ramsden, 1997) and builds upon discussions between representatives of JISC and the PA held in the summer of 1997. The full report is available on the UKOLN server at www.ukoln.ac.uk/services/elib/papers/pa/charging/ 相似文献
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Arleigh B. Williamson 《Quarterly Journal of Speech》2013,99(2):195-216
THE PRESIDENTIAL ELECTION AND TRANSITION 1960–1961. Edited by Paul T. David. Washington, D.C.: Brookings Institution, 1961; pp. x+353. $3.75. THE GREAT DEBATES: BACKGROUND, PERSPECTIVE, EFFECTS. Edited by Sidney Kraus. Bloomington, Ind.: Indiana University Press, 1962; pp. 439. $7.95. REPORT OF THE COUNTY CHAIRMAN. By James A. Michener. New York: Random House, 1961; pp. 310. $3.95. SIX CRISES. By Richard M. Nixon. New York: Doubleday, 1962; pp. xvi+459. $5.95. THE MAKING OF THE PRESIDENT 1960. By Theodore H. White. New York: Atheneum Publishers, 1961; pp. viii+393. $6.95. 相似文献
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