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Canadian journal of sport sciences = Journal canadien des sciences du sport最新文献

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Evaluating the influence of sleep deprivation upon circadian rhythms of exercise metabolism. 评估睡眠剥夺对运动代谢昼夜节律的影响。
Canadian journal of sport sciences = Journal canadien des sciences du sport Pub Date : 1992-06-01
W J Montelpare, M J Plyley, R J Shephard
{"title":"Evaluating the influence of sleep deprivation upon circadian rhythms of exercise metabolism.","authors":"W J Montelpare,&nbsp;M J Plyley,&nbsp;R J Shephard","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Cardiorespiratory and gas exchange responses to a moderate, standardized treadmill walking task showed a weak circadian rhythm, with larger superimposed peaks attributable to feeding. However, both rhythms became progressively attenuated during a period of sleep deprivation. A method of exploring this phenomenon is illustrated by an analysis of data on walking heart rate, respiratory minute volume, oxygen intake, and rating of perceived exertion, collected on 11 young men at 3-hr intervals during 60 hours of sleep deprivation.</p>","PeriodicalId":77060,"journal":{"name":"Canadian journal of sport sciences = Journal canadien des sciences du sport","volume":"17 2","pages":"94-7"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12497436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exercise-induced catabolic responses in various muscle fibres. 运动诱导的各种肌肉纤维的分解代谢反应。
Canadian journal of sport sciences = Journal canadien des sciences du sport Pub Date : 1992-06-01
E Varrik, A Viru, V Oöpik, M Viru
{"title":"Exercise-induced catabolic responses in various muscle fibres.","authors":"E Varrik,&nbsp;A Viru,&nbsp;V Oöpik,&nbsp;M Viru","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In Wistar rats a 10-hr swim caused an immediate increase of 3-methylhistidine and free tyrosine content in the white portion of quadriceps muscle. In the red portion the elevated levels of these amino acids were observed within 6 to 48 hrs of postexercise recovery. The glycogen depletion was substantially higher in the red portion of the muscle, indicating that the most active were oxidative-glycolytic fibres during the exercise. In conclusion, during exercise the most active muscle fibres do not contribute to the mobilization of protein resources. In a later part of postexercise recovery, catabolic changes occur in most active fibres, constituting, reasonably, a part of enhanced protein turnover.</p>","PeriodicalId":77060,"journal":{"name":"Canadian journal of sport sciences = Journal canadien des sciences du sport","volume":"17 2","pages":"125-8"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12498117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cognitive strategies of university athletes. 大学生运动员的认知策略。
Canadian journal of sport sciences = Journal canadien des sciences du sport Pub Date : 1992-06-01
R Madigan, R D Frey, T S Matlock
{"title":"Cognitive strategies of university athletes.","authors":"R Madigan,&nbsp;R D Frey,&nbsp;T S Matlock","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Thirty-six college basketball players and skiers, both men and women, were interviewed about their use of cognitive processes to prepare themselves for competition. The interviews examined cognitive techniques for enhancing motor skills and developing competitive strategies. During the interviews the subjects engaged in some of their cognitive preparation strategies and then described the details of these experiences. All athletes reported that the use of cognitive strategies enhanced their performance. Their imagery was rich, detailed, and multisensory. An average of three sensory modalities were present in the imagery. Vision, kinesthesis, and touch were the most common sensory experiences reported, but audition, taste, and smell were also experienced by some athletes. Strong affective states, especially confidence and satisfaction, accompanied the imagery. Individual differences in the imagery used by the athletes were also found and may be related to individual differences in the athletes' cognitive styles.</p>","PeriodicalId":77060,"journal":{"name":"Canadian journal of sport sciences = Journal canadien des sciences du sport","volume":"17 2","pages":"135-40"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12497425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A gold standard for submaximal aerobic tests. 亚极限有氧试验的黄金标准。
Canadian journal of sport sciences = Journal canadien des sciences du sport Pub Date : 1992-06-01
R J Shephard
{"title":"A gold standard for submaximal aerobic tests.","authors":"R J Shephard","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":77060,"journal":{"name":"Canadian journal of sport sciences = Journal canadien des sciences du sport","volume":"17 2","pages":"154"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12497432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerous informative studies in which the specifics of isokinetic (isovelocity) testing were examined. 在许多翔实的研究中，对等速(等速度)测试的细节进行了检查。
Canadian journal of sport sciences = Journal canadien des sciences du sport Pub Date : 1992-06-01
R Bohannon
{"title":"Numerous informative studies in which the specifics of isokinetic (isovelocity) testing were examined.","authors":"R Bohannon","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":77060,"journal":{"name":"Canadian journal of sport sciences = Journal canadien des sciences du sport","volume":"17 2","pages":"160"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12497433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Relationship among selected performance measures on the Omnitron Total Power Unit. Omnitron总功率单元所选性能指标之间的关系。
Canadian journal of sport sciences = Journal canadien des sciences du sport Pub Date : 1992-06-01
S H Westing, F I Katch
{"title":"Relationship among selected performance measures on the Omnitron Total Power Unit.","authors":"S H Westing,&nbsp;F I Katch","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The present study assessed the interrelationships among selected performance parameters on the Omnitron Total Power Unit. Forty-eight males (18 to 31 yrs) repeated on 2 days the chest press, shoulder press, lat row, and lat pull-down exercises at low, medium, and high levels of resistance. Test-retest reliability for peak force, average linear velocity, and average power output ranged form r = 0.71 to r = 0.97 (p less than 0.05) (29 of 36 correlations greater than or equal to 0.9), and demonstrate that the different testing protocols provide reliable individual differences for assessing muscular performance. The average linear velocity and average power output data provide little new information about muscular performance besides that attained from peak force analysis. The percentage common variance among the levels of resistance and output modes ranged from 90 to 98%. Thus, assessing peak force at a single level of resistance on the Omnitron is sufficient to obtain an overall assessment of muscular performance.</p>","PeriodicalId":77060,"journal":{"name":"Canadian journal of sport sciences = Journal canadien des sciences du sport","volume":"17 2","pages":"120-4"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12498116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of interval and continuous training on aerobic parameters. 间歇和连续训练对有氧参数的影响。
Canadian journal of sport sciences = Journal canadien des sciences du sport Pub Date : 1992-06-01
E W Banister
{"title":"The effect of interval and continuous training on aerobic parameters.","authors":"E W Banister","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":77060,"journal":{"name":"Canadian journal of sport sciences = Journal canadien des sciences du sport","volume":"17 2","pages":"153-4"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12497431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of interval and continuous training on the aerobic parameters. 间歇和连续训练对有氧参数的影响。
Canadian journal of sport sciences = Journal canadien des sciences du sport Pub Date : 1992-06-01
T J Overend, D H Paterson, D A Cunningham
{"title":"The effect of interval and continuous training on the aerobic parameters.","authors":"T J Overend,&nbsp;D H Paterson,&nbsp;D A Cunningham","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The purpose of this study was to investigate changes in the parameters of aerobic function resulting from continuous training (CT) and interval training of both low power (LPO-IT) and high power output (HPO-IT). Untrained males (n = 17, 25.1 yrs) trained 10 weeks on cycle ergometers (four 40-min sessions a week) at 80% VO2max. Cycle ramp function tests at 0 and 10 weeks were used to determine the four aerobic parameters:VO2max, ventilation threshold (VeT), effective time constant for O2 uptake kinetics (MRT), and work efficiency (eta): VO2max increased significantly (3.30 to 3.66 l.min-1). Absolute VeT increased significantly (2.17 to 2.45 l.min-1) but there was no change in the relative threshold (VeT/VO2max). MRT decreased significantly from 38.8 to 33.1 seconds and there was no change in eta. There were no between-group differences; thus neither low power output nor high power output interval training offers an advantage over continuous training of the same average power output in altering the aerobic parameters.</p>","PeriodicalId":77060,"journal":{"name":"Canadian journal of sport sciences = Journal canadien des sciences du sport","volume":"17 2","pages":"129-34"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12498118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
[The effects of positive, negative and neutral self-talk on motor performance]. [积极、消极和中性自言自语对运动表现的影响]。
Canadian journal of sport sciences = Journal canadien des sciences du sport Pub Date : 1992-06-01
E Dagrou, L Gauvin, W Halliwell
{"title":"[The effects of positive, negative and neutral self-talk on motor performance].","authors":"E Dagrou,&nbsp;L Gauvin,&nbsp;W Halliwell","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The purpose of this study was to examine the influence of self-talk on motor performance. Forty-six (46) male and female college students from the Ivory Coast were randomly assigned to two experimental groups (N = 15 for each) and one control group (N = 16). All subjects completed 5 blocs of 10 trials of a dart throw on a 45-cm by 45-cm target. The distance from the center of the target was recorded by measuring the distance along the x and y axes. Subjects in one experimental group (VP) were asked to repeat aloud positive verbalizations in between blocs of trials, while subjects in the other experimental group (VN) repeated aloud negative verbalizations in between blocs of trials. The control group (T) rested between trials. Results indicated that the angular errors in the VP group decreased faster than those of the T group, that the performance of the VN group did not improve significantly, and that the rate of angular error in the VN group was higher than that of the T and VP groups.</p>","PeriodicalId":77060,"journal":{"name":"Canadian journal of sport sciences = Journal canadien des sciences du sport","volume":"17 2","pages":"145-7"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12497427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Selection of a maximal test protocol to validate the Canadian Aerobic Fitness Test. 选择最大测试方案来验证加拿大有氧体能测试。
Canadian journal of sport sciences = Journal canadien des sciences du sport Pub Date : 1992-06-01
I M Weller, S G Thomas, P N Corey, M H Cox
{"title":"Selection of a maximal test protocol to validate the Canadian Aerobic Fitness Test.","authors":"I M Weller,&nbsp;S G Thomas,&nbsp;P N Corey,&nbsp;M H Cox","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The purpose of this study was to select a maximal aerobic power test protocol with which to validate a submaximal step test prediction equation. Subjects (N = 129), males and females 15 to 69 years of age, performed one maximal step test and one maximal treadmill test. The maximal treadmill protocol yielded higher peak VO2, ventilation, heart rate, and RER values. An age-predicted maximum heart rate was achieved by 35% of subjects on the step test and 55% on the treadmill. An RER of 1.15 was attained by 22% of the subjects on the step test and 53% on the treadmill. Regression analysis indicated that the submaximal test was more predictive of VO2max when the maximum was attained using the treadmill rather than the maximal step protocol. Peak VO2 values obtained from subjects tested on the treadmill will be used to develop a new prediction equation for the Canadian Aerobic Fitness Test.</p>","PeriodicalId":77060,"journal":{"name":"Canadian journal of sport sciences = Journal canadien des sciences du sport","volume":"17 2","pages":"114-9"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12498115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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