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排序方式: 共有316条查询结果,搜索用时 234 毫秒
81.
The study examined the prevalence of overweight cases in a sample of 151 deaf children aged 6-11 years. Participants were deaf students attending six elementary schools, both regular and special, in four states. Body mass index (BMI) was calculated using height and weight, plotted on the Center for Disease Control and Prevention (CDC) U.S. BMI-for-age growth charts, then compared to national values for same age and gender (CDC, 2006a, 2006b; National Center for Health Statistics, 2005). The results indicated that the prevalence of overweight deaf children aged 6-11 years was above the national percentage for same age and gender. A larger percentage of boys was overweight (24.7%) than girls (20.4%). After age 8 years, girls showed a consistent decrease in BMI with increasing age, a trend not demonstrated by boys. As a group, deaf children demonstrate a higher prevalence of overweight than national averages. 相似文献
82.
Richard Ellis 《Curator: The Museum Journal》1997,40(1):30-55
Models of the giant squid (Architeuthis spp.) are probably unique in natural history exhibition: they are representations of a giant living animal that has never been seen in a healthy state by a human being. Since its discovery in the mid-nineteenth century, the giant squid has remained one of the world's great zoological mysteries. In the attempt to introduce this fabulous creature, museums around the world have resorted to life-sized models. Yale teuthologist A.E. Verrill was responsible for the first such models in 1882; then Ward's Natural Science Establishment in Rochester, New York, manufactured and sold them. In this century, various museums (and one zoo) have made their own models of these ten-armed monsters of the deep. Their disparate attempts to re-create Architeuthis for the museum public represent one of the most intriguing case histories in the annals of museum exhibition. 相似文献
83.
Students who completed a Child Development course (N = 1168) from 3 to 16 years prior to retention testing were tested for recognition and recall of facts and application of mental skills. Students who subsequently served as course tutors were also tested for retention. Fact retention was superior to application retention and retention for both question types declined rapidly from year 3 to year 7 after which it stabilized. Recognition items were superior to recall items for high achieving students only. Tutors retained more than non-tutors for eight years after which there were no differences. 相似文献
84.
Moore DS Ellis R Allen PD Cherry KE Monroe PA O'Neil CE Wood RH 《Research quarterly for exercise and sport》2008,79(1):42-50
The purpose of this study was to establish validity evidence of four physical activity (PA) questionnaires in culturally diverse older adults by comparing self-report PA with performance-based physical function. Participants were 54 older adults who completed the Continuous Scale Physical Functional Performance 10-item Test (CS-PFP10), Physical Activity Scale for the Elderly (PASE), HAMPS Physical Activity Questionnaire for Older Adults, Yale Physical Activity Survey (YPAS), and modified Baecke questionnaire. The total PASE score, three outcome scores for the CHAMPS, and three summary indices for the YPAS were significantly correlated with total CS-PFP10 score. The modified Baecke exhibited no correlations with CS-PFP10 scores. The PASE, CHAMPS, and YPAS appear to be the most valid PA self-report questionnaires for culturally diverse older adults. 相似文献
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Self-reported ability assessment in rock climbing 总被引:1,自引:1,他引:0
Draper N Dickson T Blackwell G Fryer S Priestley S Winter D Ellis G 《Journal of sports sciences》2011,29(8):851-858
Level of ability within rock climbing is generally expressed in terms of a "best ascent", rated using various grading systems within the sport. The most common method of obtaining this information is via self-report. The aim of this study was to examine the validity of self-reported climbing grades. Twenty-nine competitive rock climbers (17 males, 12 females) were first asked to report their current (defined as within the last 12 months) best on-sight lead ascent grade (Aus/NZ). The participants then climbed a specifically designed indoor route, under on-sight conditions (one attempt, no route practice or preview), to obtain an assessed grade. The route increased in difficulty, and was such that the distance achieved by the climber corresponded to a particular grade. The mean (±standard deviation) self-reported and assessed grade was 22.6?±?3.4 and 22.0?±?3.0 (Aus/NZ) respectively. Despite slight over- and underestimations in males and females respectively, there was no statistically significant difference between self-reported and assessed on-sight climbing grades. The results of this study suggest that self-reported climbing grades provide a valid and accurate reflection of climbing ability. 相似文献
89.
Irwin C Desbrow B Ellis A O'Keeffe B Grant G Leveritt M 《Journal of sports sciences》2011,29(5):509-515
In this study, we investigated the impact of a controlled 4-day caffeine withdrawal period on the effect of an acute caffeine dose on endurance exercise performance. Twelve well-trained and familiarized male cyclists, who were caffeine consumers (from coffee and a range of other sources), were recruited for the study. A double-blind placebo-controlled cross-over design was employed, involving four experimental trials. Participants abstained from dietary caffeine sources for 4 days before the trials and ingested capsules (one in the morning and one in the afternoon) containing either placebo or caffeine (1.5 mg · kg(-1) body weight · day(-1)). On day 5, capsules containing placebo or caffeine (3 mg · kg(-1) body weight) were ingested 90 min before completing a time trial, equivalent to one hour of cycling at 75% peak sustainable power output. Hence the study was designed to incorporate placebo-placebo, placebo-caffeine, caffeine-placebo, and caffeine-caffeine conditions. Performance time was significantly improved after acute caffeine ingestion by 1:49 ± 1:41 min (3.0%, P = 0.021) following a withdrawal period (placebo-placebo vs. placebo-caffeine), and by 2:07 ± 1:28 min (3.6%, P = 0.002) following the non-withdrawal period (caffeine-placebo vs. caffeine-caffeine). No significant difference was detected between the two acute caffeine trials (placebo-caffeine vs. caffeine-caffeine). Average heart rate throughout exercise was significantly higher following acute caffeine administration compared with placebo. No differences were observed in ratings of perceived exertion between trials. A 3 mg · kg(-1) dose of caffeine significantly improves exercise performance irrespective of whether a 4-day withdrawal period is imposed on habitual caffeine users. 相似文献
90.