The decline of women leaders (coaches and athletic directors) in girls' interscholastic sport programs in Virginia from 1972 to 1987     

M F Heishman  L Bunker  R W Tutwiler 《Research quarterly for exercise and sport》1990,61(1):103-107

  相似文献   

The relevance of IQ in the determination of learning disabilities: abandoning scores as decision makers     

S Graham  K R Harris 《Journal of learning disabilities》1989,22(8):500-503

  相似文献   

Cardiovascular and ventilatory responses during formalized T'ai Chi Chuan exercise   总被引：2，自引：0，他引：2  

D D Brown  W G Mucci  R K Hetzler  R G Knowlton 《Research quarterly for exercise and sport》1989,60(3):246-250

T'ai Chi Chuan (TCC) is a widely practiced Chinese martial art said to physically develop balance and coordination as well as enhance emotional and mental health. TCC consists of a series of postures combined into a sequential movement providing a smooth, continuous, low-intensity activity. The purpose of this study was to examine the ventilatory and cardiovascular responses to the Long Form of Yang's style TCC. In addition, the subjects' TCC responses were compared to their ventilatory and cardiovascular responses during cycle ergometry at an oxygen consumption (VO2) equivalent to the mean TCC VO2. Six experienced (M = 8.3 yrs) male TCC practitioners served as subjects with data collected during the Cloud H and movement of the TCC exercise. Significantly (p less than .05) lower responses for ventilatory frequency (Vf) (11.3 and 15.7 breaths.min-1), ventilatory equivalent (VE/VO2) (23.47 and 27.41), and the ratio of dead space ventilation to tidal volume (VD/VT) (20 and 27%) were found in TCC in comparison to cycle ergometry. The percentage of minute ventilation used for alveolar ventilation was significantly higher during TCC (p less than .03) than cycle ergometry, with mean values of 81.1% and 73.1%, respectively. Cardiac output, stroke volume, and heart rate were not significantly different between TCC exercise and cycle ergometry at the same oxygen consumption. We concluded that, during TCC, expert practitioners show significantly different ventilatory responses leading to more efficient use of the ventilatory volume than would be expected from comparable levels of exertion on a cycle ergometer.  相似文献   

Validity of a near-infrared spectrophotometry device for estimating human body composition     

R G Israel  J A Houmard  K F O'Brien  M R McCammon  B S Zamora  A W Eaton 《Research quarterly for exercise and sport》1989,60(4):379-383

  相似文献   

ORIENTING STUDENT INDEPENDENT SCIENTDFIC ACTIVITY WITH A HIGH DEGREE OF PERSONAL INITIATIVE     

Horst Möhle 《Higher Education in Europe》1985,10(1):58-63

  相似文献   

The research committee at the armidale C.A.E.     

Kevin R. Smith 《The Australian Educational Researcher》1985,12(2):55-59

  相似文献   

The effect of video-feedback on the learning of the tennis service by intermediate players     

P C Van Wieringen  H H Emmen  R J Bootsma  M Hoogesteger  H T Whiting 《Journal of sports sciences》1989,7(2):153-162

Effects of video-feedback on improvement of the tennis service were investigated in subjects having at least 2 years of playing experience in tennis. The experiment was carried out in an indoor tennis hall under normal training conditions. Subjects were randomly divided into three groups: a video-feedback training (VFT) group, a traditional training (TT) group and a control group, each consisting of 22 subjects. While the subjects of the control group received no training at all, subjects in both the VFT and TT groups were trained twice weekly during 5 consecutive weeks. Each training session lasted 40 min, of which 30 min was spent on actual practice in training of the service. The remaining 10 min was spent on watching, analysing and discussing video recordings of either their own service performed during the training session (VFT group), or ground strokes and volleys of top level players (TT group). Both the VFT and TT group showed significantly greater improvements in both achievement scores and form (technique) scores than did the control group. No differences, however, could be demonstrated between the VFT and TT group, indicating that the subjects of the former group did not benefit from the video-feedback they received. While form scores correlated significantly (P less than 0.001) with the velocity of the served ball, no such relation between form scores and spatial accuracy was apparent.  相似文献   

Health locus of control predicts free-living, but not supervised, physical activity: a test of exercise-specific control and outcome-expectancy hypotheses     

R K Dishman  M Steinhardt 《Research quarterly for exercise and sport》1990,61(4):383-394

We statistically controlled fitness (1.5-mile run), outcome-expectancy values, and perceived barriers for physical activity and then compared internal health locus of control (IHLOC) with internal exercise locus of control (IEXLOC) for predicting the physical activity of college students (N = 84). Prospective observations of self-reported free-living physical activity (seven-day recall) and supervised running (time x distance) were made at 2-, 5-, and 9-week intervals. IHLOC predicted seven-day recall at Week 2 (beta = .19) and Week 5 (beta = .36) (increase in adjusted R2 ranged from .05 to .12, p less than .05). Consistent with theory, the prediction was not reproducible when generalized outcome-expectancy value rather than outcome-expectancy value for health was assessed. IHLOC was unrelated to supervised running. IEXLOC was unrelated to activity in all analyses, even though exercise-specific measures of outcome-expectancy values (beta s = .20) and perceived barriers (beta s = .27-.32) predicted both seven-day recall and supervised running (p less than .05). IHLOC also discriminated (p less than .05) high active and low active subjects when criterion groups were formed from population norms on seven-day recall (greater than or less than 280 kcal.kg-1.week-1). Results indicate that tests of decision theories that include locus of control measures specific to health or exercise must adjust for fitness, perceived barriers to physical activity, and behaviorally relevant outcome-expectancy values of physical activity when studying college students. The construct validity of exercise locus of control remains uncertain for college students.  相似文献   

Purifying argon for filling incandescent lamps : Robert P. Moran in Industrial Gas, Vol. 14, No. 6     

R.H.O. 《Journal of The Franklin Institute》1936

  相似文献   

Why Light in the Library or Comments on Illumination     

Stecher RM 《Bulletin of the Medical Library Association》1947,35(3):137-145

  相似文献