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202 results on '"GLEDHILL, N."'

9. Iron founding in Britain - a status report

Author

Gledhill, N.

Subjects
Metal castings industry -- Economic aspects, Foundries -- United Kingdom, Iron foundries -- United Kingdom, Business, Metals, metalworking and machinery industries
Published
1991

32. Relationship of physical fitness test results and hockey playing potential in elite-level ice hockey players.

Author

Burr JF, Jamnik RK, Baker J, Macpherson A, Gledhill N, and McGuire EJ

Abstract

The primary purpose of this study was to determine the fitness variables with the highest capability for predicting hockey playing potential at the elite level as determined by entry draft selection order. We also examined the differences associated with the predictive abilities of the test components among playing positions. The secondary purpose of this study was to update the physiological profile of contemporary hockey players including positional differences. Fitness test results conducted by our laboratory at the National Hockey League Entry Draft combine were compared with draft selection order on a total of 853 players. Regression models revealed peak anaerobic power output to be important for higher draft round selection in all positions; however, the degree of importance of this measurement varied with playing position. The body index, which is a composite score of height, lean mass, and muscular development, was similarly important in all models, with differing influence by position. Removal of the goalies' data increased predictive capacity, suggesting that talent identification using physical fitness testing of this sort may be more appropriate for skating players. Standing long jump was identified as a significant predictor variable for forwards and defense and could be a useful surrogate for assessing overall hockey potential. Significant differences exist between the physiological profiles of current players based on playing position. There are also positional differences in the relative importance of anthropometric and fitness measures of off-ice hockey tests in relation to draft order. Physical fitness measures and anthropometric data are valuable in helping predict hockey playing potential. Emphasis on anthropometry should be used when comparing elite-level forwards, whereas peak anaerobic power and fatigue rate are more useful for differentiating between defense. [ABSTRACT FROM AUTHOR]

Published
2008
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48. Validation of noninvasive maximal cardiac output measurement

Author

Froese Ab, Gledhill N, Jamnik Vk, and Smyth Rj

Subjects
Adult, Male, Cardiac output, Respiration, Physical Exertion, Dye Dilution Technique, Physical Therapy, Sports Therapy and Rehabilitation, Mass Spectrometry, Cardiac output measurement, Humans, Orthopedics and Sports Medicine, Cardiac Output, Maximal exercise, Sources of error, Biomedical engineering, Mathematics
Abstract

Due to the invasiveness of direct techniques and problems that constrain the use of popular indirect techniques during very heavy (non-steady-state) exercise, measurements of maximal cardiac output are seldom included in studies of exercise. The acetylene-rebreathing technique is well-suited for maximal exercise; however, until recent technological advances, difficulties involved in collecting and measuring alveolar acetylene samples have restricted its use. We compared cardiac output values measured via the acetylene-rebreathing technique (QA) (modified for use with a mass spectrometer) and the dye-dilution technique (QD) at rest and during light to maximal exercise in six moderately active males. Although QA consistently underestimated QD, the two techniques showed a significant correlation of 0.87 throughout all levels of exercise. During maximal exercise, QA and QD values were not significantly different (24.7 and 26.7 l X min-1, respectively). Modifications in the QA technique that reduce potential sources of error were also examined. We conclude that the acetylene-rebreathing technique, modified for use with a mass spectrometer, is a simple and valid procedure for measuring maximal cardiac output.

Published
1984
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49. Effect of acute induced metabolic alkalosis on 800m racing time

Author

WILKES, D., GLEDHILL, N., and SMYTH, R.

Abstract

WILKES, D., N. GLEDHILL, and R. SMYTH. Effect of acute induced metabolic alkalosis on 800-m racing time. Med. Set. Sports Exerc., Vol. 15, No. 4, pp. 277–280, 1983. Six trained middle-distance runners were studied under alkalotic (NaHCOaingestion), placebo (CaCO3ingestion), and control conditions to determine the effect of an acute induced metabolic alkalosis on time to run an 800-m race. Pre-exercise, following NaHCO3ingestion, pH and standard [HCO3-] were significantly higher. In the alkalotic condition, subjects ran faster (2.9 s) and the corresponding post-exercise values for blood [lactate] and extracellular H+were higher than in the control and placebo conditions, suggesting an increased anaerobic energy contribution. These results support the speculation that the increase in extracellular buffering following NaHCO3ingestion facilitated H+efflux from the cells of working muscle, thereby delaying the decrease in intracellular pH and postponing fatigue. It is concluded that the ingestion of NaHCO3by trained middle-distance runners prior to an 800-m race has an ergogenic benefit.

Published
1983

50. The 2004 Canadian Hypertension Education Program recommendations for the management of hypertension: Part I - Blood pressure measurement, diagnosis and assessment of risk

Author

Hemmelgarn, B. R., Zarnke, K. B., Campbell, N. R. C., Feldman, R. D., Mckay, D. W., Mcalister, F. A., Khan, N., Schiffrin, E. L., Myers, M. G., Bolli, P., Honos, G., Lebel, M., Levine, M., Abbott, C., Mann, K., Wilson, T., Tremblay, G., Chokalingam, A., Myers, M., Rabkin, S., Moe, G., Shiffrin, E., Touyz, R. M., Logan, S., Petrella, R., Gledhill, N., Campbell, N., Grover, S., Lewanczuk, R., Carruthers, G., Culleton, B., Fodor, G., Hamet, P., Herman, R., Arnold, M., Stone, J., Mahon, J., Jones, C., Larochelle, P., Ogilvie, R., Tobe, S., Burgess, E., Herbert, C., Drouin, D., Milot, A., Eady, A., Repchinsky, C., Ruddy, T., Semchuk, B., Wilson, E., Chander, S., Shuckle, P., Gibson, P., Johansen, H., Levy, A., Onysko, J., and Karen Tu

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