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91.
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Boris Ford 《Higher Education Quarterly》1969,23(3):282-286
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César M.P. Meylan John B. Cronin Jon L. Oliver Michael M.G. Hughes Boris Jidovtseff Shane Pinder 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(1):68-80
The purpose of this study was to quantify the inter-session reliability of force–velocity–power profiling and estimated maximal strength in youth. Thirty-six males (11–15 years old) performed a ballistic supine leg press test at five randomized loads (80%, 100%, 120%, 140%, and 160% body mass) on three separate occasions. Peak and mean force, power, velocity, and peak displacement were collected with a linear position transducer attached to the weight stack. Mean values at each load were used to calculate different regression lines and estimate maximal strength, force, velocity, and power. All variables were found reliable (change in the mean [CIM] = ? 1 to 14%; coefficient of variation [CV] = 3–18%; intraclass correlation coefficient [ICC] = 0.74–0.99), but were likely to benefit from a familiarization, apart from the unreliable maximal force/velocity ratio (CIM = 0–3%; CV = 23–25%; ICC = 0.35–0.54) and load at maximal power (CIM = ? 1 to 2%; CV = 10–13%; ICC = 0.26–0.61). Isoinertial force–velocity–power profiling and maximal strength in youth can be assessed after a familiarization session. Such profiling may provide valuable insight into neuromuscular capabilities during growth and maturation and may be used to monitor specific training adaptations. 相似文献
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Boris Hughes 《Publishing Research Quarterly》2014,30(3):295-299
Considerable changes are taking place in the publishing industry, and to survive publishers cannot sit back and wait for the changes to take effect. With e-books supposedly pulling ahead in the publisher’s race, the publishing industry must revise its business models to adjust to new demands. While e-books are attractive, print is still the major revenue engine within the world of publishing, and digital print is the future. Considering the entirety of the supply chain, it can be seen that digital book printing books saves money, supports more titles and increases efficiency. There is a different way to get a better bottom line, and publishers must consider the whole value chain, not just the unit price. 相似文献