Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport最新文献_第10页

Athletes' assessment of the coach--the coach evaluation questionnaire. 运动员对教练员的评价——教练员评价问卷。

Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport Pub Date : 1985-09-01

B S Rushall, K Wiznuk

引用次数: 0

1001 disorders of the ear, nose and sinuses in scuba divers. 水肺潜水员耳、鼻、鼻窦疾病1001例。

Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport Pub Date : 1985-06-01

N Roydhouse

引用次数: 0

Normalizing the performances of athletes in Olympic weightlifting. 规范运动员在奥运会举重比赛中的表现。

Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport Pub Date : 1985-06-01

R G Sinclair

引用次数: 0

Alterations in head dynamics with the addition of a hockey helmet and face shield under inertial loading. 在惯性载荷下，冰球头盔和面罩在头部动力学上的改变。

Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport Pub Date : 1985-06-01

A W Smith, P J Bishop, R P Wells

{"title":"Alterations in head dynamics with the addition of a hockey helmet and face shield under inertial loading.","authors":"A W Smith, P J Bishop, R P Wells","doi":"","DOIUrl":"","url":null,"abstract":"The effect of a hockey helmet and face shield on the head and neck during inertial loading was studied. A Hybrid III Anthropometric Test Dummy (ATD) was struck from both the front and rear by a spring-loaded, instrumented striker moving at 2.9 ms-1. Data were collected from a triaxial force transducer mounted at the atlanto-occipital (a-o) junction of the ATD, a load cell in the striker, and by cinematography (250 fps). Angular kinematics of the head and moments of force about the a-o junction were determined along with impact force levels. When compared to a bare-head condition, the addition of a helmet and face shield caused an increase in head angular displacement (20-40%) but did not affect head angular acceleration. Axial and shear forces at the a-o junction did not change appreciably with the addition of a helmet and face shield. A triphasic pattern was evident for the neck moments including a small phase which represented a seating of the headform on the nodding blocks of the uppermost ATD neck segment, and two larger phases of opposite polarity which represented the motion of the head relative to the trunk during the first 350 ms after impact. No substantial differences were apparent between the helmeted and non-helmeted trials. The magnitudes of forces and moments found in the present study were well within tolerance levels reported by others (Melvin, 1979; Cheng et al., 1982). It was concluded that the increase in angular displacement of the head, with the addition of a helmet and face shield, does not place the wearer in a position of increased risk of cervical spine trauma.","PeriodicalId":75669,"journal":{"name":"Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport","volume":"10 2","pages":"68-74"},"PeriodicalIF":0.0,"publicationDate":"1985-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"15130487","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

Age specific prediction of maximal oxygen uptake in boys. 男孩最大摄氧量的年龄特异性预测。

Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport Pub Date : 1985-06-01

D A Cunningham, D H Paterson

{"title":"Age specific prediction of maximal oxygen uptake in boys.","authors":"D A Cunningham, D H Paterson","doi":"","DOIUrl":"","url":null,"abstract":"Maximal oxygen uptake was determined in 62 boys each year from age 11 to 15 years. Multiple regression analyses were used to predict treadmill VO2 max at yearly age intervals from size measures and submaximal cycle heart rates. Derived equations were validated in an independent sample of 98 boys of the same age range. In boys aged 12 to 15 years approximately 80% or more of the variance in VO2 max was accounted for by age specific equations employing mass, height and skinfolds as explanatory variables. Prediction of VO2max was not as strong for 10 and 11 year olds, with less than 70% of the variance explained. Measures of VO2 or work rate and heart rate were not useful in predicting VO2max either by themselves or in conjunction with the size measures. The findings clearly demonstrated that submaximal exercise testing to predict VO2max, or cardiorespiratory fitness, in boys was of questionable value. The prediction of VO2max in boys aged 12 to 15 by in the independent sample was shown to have a mean absolute error of 6 to 8% while the value for age 11 y was 10%. The error is similar in magnitude to that of predicting VO2max with an exercise test in adults. The present age specific equations resulted in smaller errors of estimation than found in previous studies of VO2max estimation in children.","PeriodicalId":75669,"journal":{"name":"Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport","volume":"10 2","pages":"75-80"},"PeriodicalIF":0.0,"publicationDate":"1985-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"15130488","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

Force analysis of the rowing stroke employing two differing oar grips. 采用两种不同握桨的划桨冲程力分析。

Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport Pub Date : 1985-06-01

T O Bompa, M Hebbelinck, B Van Gheluwe

引用次数: 0

Accuracy of residual volume prediction--effects on body composition estimation in pulmonary dysfunction. 残气量预测的准确性——对肺功能障碍患者体成分估计的影响。

Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport Pub Date : 1985-06-01

A C Hackney, D T Deutsch

引用次数: 0

Ventilation thresholds may be misinterpreted with the presentation of mean data. 通风阈值可能会因平均数据的呈现而被误解。

Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport Pub Date : 1985-06-01

T M McLellan

引用次数: 0

Submaximal endurance performance related to the ventilation thresholds. 亚最大耐力表现与通风阈值有关。

Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport Pub Date : 1985-06-01

T M McLellan, J S Skinner

{"title":"Submaximal endurance performance related to the ventilation thresholds.","authors":"T M McLellan, J S Skinner","doi":"","DOIUrl":"","url":null,"abstract":"This study was undertaken to compare the variance in time to fatigue (TF) at intensities expressed relative to VO2max, ventilation threshold 1 (VT1) or 2 (VT2). Two 3-min, 30 Watt incremental tests on the cycle ergometer were used to determine VO2max (50.7 +/- 7.2 ml X kg-1 X min-1), VT1 (51.7 +/- 3.7% VO2max) and VT2 (79.0 +/- 3.7% VO2max) for 16 subjects. At weekly intervals, subjects worked to volitional fatigue at 3 randomly-ordered power outputs that represented 73.1 +/- 2.8, 85.4 +/- 2.8 and 95.0 +/- 3.4% VO2max. A significant quadratic interaction was observed for TF values between VO2max and intensity, suggesting a different magnitude of response related to VO2max. Subject data were then grouped according to VO2max into a low (N = 5, 40-44 ml X kg-1 X min-1), medium (N = 5, 48-52 ml X kg-1 X min-1) or high (N = 6, 56-61 ml X kg-1 X min-1) category. For all groups, a decaying exponential function best described the relationship between TF and intensity. The method of expressing intensity appeared to have only a small effect on the proportion of variance explained by this logarithmic relationship (0.85 less than or equal to r2 less than or equal to 0.93). In contrast, however, a 30% reduction in the standard error of estimate for TF was observed when intensity was expressed relative to both ventilation thresholds as compared to the traditional expression of intensity relative to VO2max.(ABSTRACT TRUNCATED AT 250 WORDS)","PeriodicalId":75669,"journal":{"name":"Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport","volume":"10 2","pages":"81-7"},"PeriodicalIF":0.0,"publicationDate":"1985-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"15130489","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

Finger release sequence for fastball and curveball pitches. 快速球和曲线球的手指释放顺序。

Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport Pub Date : 1985-03-01

J M Stevenson

{"title":"Finger release sequence for fastball and curveball pitches.","authors":"J M Stevenson","doi":"","DOIUrl":"","url":null,"abstract":"The purpose of this study was to determine the action of the thumb, index, and middle fingers in releasing fastballs and curveballs for nine right-handed college pitchers. Micro-switches for the fingers were created by using two strips of electroconductive tape and a ball covered with electroconductive paint. Time data, accurate to 10(-4)s, were initiated by the stride foot onto a floor mat switch. When each digit left the ball, a corresponding timer was triggered with the final channel tripped by a contact switch in the catcher's glove. A total of 103 fastball and 88 curveball trials had complete data for each of the variables studied. Results showed that for the fastball, in 91.1% of the cases, the thumb preceded the middle and index fingers by approximately 6 ms. (p less than .001) but there was no significant difference between the middle and index fingers. The curveball data indicated that five of the nine pitchers had a definite release sequence of thumb first followed by middle then index finger (p less than .001). In total, 72.7% of the curveballs thrown had a release sequence of thumb, middle, and index fingers and 24.0% had a middle, thumb, index finger release sequence. The remaining 2.3% of the pitches had either similar times or odd combinations of release sequence.","PeriodicalId":75669,"journal":{"name":"Canadian journal of applied sport sciences. Journal canadien des sciences appliquees au sport","volume":"10 1","pages":"21-5"},"PeriodicalIF":0.0,"publicationDate":"1985-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"15120810","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