排序方式： 共有39条查询结果，搜索用时 15 毫秒
21.
Marquell Johnson Kristin Meltz Kayla Hart Molly Schmudlach Lauren Clarkson Kate Borman 《Journal of sports sciences》2015,33(8):769-776
This study examined the validity of the Actical accelerometer step count and energy expenditure (EE) functions in healthy young adults. Forty-three participants participated in study 1. Actical step counts were compared to actual steps taken during a 200 m walk around an indoor track at self-selected pace and during treadmill walking at different speeds (0.894, 1.56 and 2.01 m · s–1) for 5 min. The Actical was also compared to three pedometers. For study 2, 15 participants from study 1 walked on a treadmill at their predetermined self-selected pace for 15 min. Actical EE was compared to EE measured by indirect calorimetry. One-way analysis of variance and t-tests were used to examine differences. There were no statistical difference between Actical steps and actual steps in self-selected pace walking and during treadmill walking at moderate and fast speeds. During treadmill walking at slow speed, the Actical step counts significantly under predicted actual steps taken. For study 2, there was no statistical difference between measured EE and Actical-recorded EE. The Actical provides valid estimates of step counts at self-selected pace and walking at constant speeds of 1.56 and 2.01 m · s–1. The Actical underestimates EE of walking at constants speeds ≥1.38 m · s–1. 相似文献
22.
Brandon A. Baiamonte Robert R. Kraemer Chelsea N. Chabreck Matthew L. Reynolds Kayla M. McCaleb Georgia L. Shaheen 《Journal of sports sciences》2017,35(18):1831-1837
Previous research has demonstrated significant decreases in pain perception in healthy individuals following both aerobic and upper body resistance exercise, but research on circuit training has been limited. The purpose of the study was to determine the effects of a strenuous bout of dynamic circuit resistance exercise on pain threshold and pain tolerance in conjunction with changes in blood lactate levels, heart rate (HR), and perceived exertion. A sample of 24 college-age students participated in 2 sessions: (1) a maximal strength testing session and (2) a circuit training bout of exercise that consisted of 3 sets of 12 repetitions with a 1:1 work to rest ratio at 60% one-repetition maximum (1-RM) predicted from a three-repetition maximum (3-RM) for 9 exercises. Participants exhibited increases in pain tolerance, blood lactate levels, HR and perceived exertion following resistance exercise. Preference for exercise intensity was positively correlated with lactate post exercise and tolerance for exercise intensity was positively correlated with pain tolerance and lactate post exercise. In conclusion, this is the first study to demonstrate increases in pain tolerance following a dynamic circuit resistance exercise protocol and disposition for exercise intensity may influence lactate and pain responses to circuit resistance exercise. 相似文献
23.
In this Forum paper we synthesize some of the main ideas from three papers: Auli Orlander and Per-Olof Wickman’s (Cult Stud
Sci 6, 2011), Bodily experiences in secondary school biology, Roger Sages’ (Cult Stud Sci Educ 6, 2011), About Descartes: Uses and misuses, and Steve Alsop’s (Cult Stud Sci Educ 6, 2011), The body bites back! These papers challenged us to identify how emotions functioned as elements of bodily experiences in classroom transactions
and why science teachers often are not responsive to students’ emoting. We also explored how teachers making use of curriculum and companion meanings could support the construction of learning
environments that more productively support students’ science learning. 相似文献
24.
25.
This study examined the perceptions and concerns of current academic department chairs as they consider the transition to
full responsibilities as a faculty member after the completion of a term in this leadership role. Currently, little research
has focused on the dynamics of this transition process. Findings indicated that most department chairs planned to return to
faculty positions and that a primary concern was reconstructing research agendas with minimal support. The discussion proposes
ways in which institutions can support the return of former chairs to a faculty position that demands and rewards achievement
in teaching, research, and service. These findings have implications for influencing policies and procedures relative to securing
and continuing quality leadership and faculty productivity at the departmental level. 相似文献
26.
Manipulating the ratio of known to unknown items has been shown to improve student on‐task behavior and increase the desirability of schoolwork. Although many intervention protocols manipulate ratios of known to unknown items, these frequently require extensive adult cuing. School psychologists recommending such interventions may face resistance from teachers who find the work to be too time intensive. Self‐administered interventions whereby the students act as primary interventionists may alleviate this concern. A modified multiple baseline design across a group of 11 students identified by their teachers as having difficulty mastering multiplication facts was used to evaluate a self‐administered folding‐in technique. As hypothesized, for the overall sample, stronger effects were observed on math curriculum‐based measures (CBM) than on a control reading task (Maze CBM). Individually, 7 of the 11 students demonstrated higher levels of growth during the intervention phase than during the baseline phase. No student demonstrated higher Maze CBM growth rates during the intervention phase relative to the baseline phase. In contrast, of the 4 students for whom a link between the intervention and the baseline could not be established, 3 demonstrated higher levels of performance on math CBMs following the intervention phase. Results are discussed in light of a response‐to‐intervention model. © 2012 Wiley Periodicals, Inc. 相似文献
27.
The role of librarians in addressing health insurance information needs emerged following a request from President Barack Obama for librarians to assist the public with navigating the Affordable Care Act and the Health Insurance Marketplace. The goal of this article is to highlight a number of concrete ways reference work could be expanded, especially in public library settings, to support health insurance literacy concerns by offering illustrative examples and recommendations for authoritative health insurance information resources. Overall, this article contributes to the existing literature by offering practical recommendations that may be relevant to reference librarians supporting the health insurance information needs of their communities. 相似文献
28.
Claudia Mitchell Charles Kusner Paula Charbonneau‐Gowdy 《Changing English: An International Journal of English Teaching》2004,11(2):279-289
To begin … a moral tale for anthropologists, a fantasy in which an anthropological cinema exists—not documentaries about ‘anthropological’ subjects but films designated by anthropologists to communicate anthropological insights. It is a well‐articulated genre distinct from the conceptual limitations of realist documentary and broadcast journalism. It borrows conventions and techniques from the whole of cinema—fiction, documentary, animation and experimental … this fantasy is more like science fiction than anything else. It is not remotely close to being realized. But it is an ideal worth pursuing (Ruby, 2000, pp. 1–2). 相似文献
29.
Georgia W. Hodges Kayla Flanagan Juyeon Lee Allan Cohen Sandhya Krishnan Cynthia Ward 《科学教学研究杂志》2020,57(9):1460-1489
Serious educational gameplay continues to gain traction in K-12 educational settings, as access to novel technologies increases. Increased access to computers and other devices has shifted the landscape of the classroom, increasing students' screen-time, as technology infused lessons replace other learning experiences. Amid this context, our research team created a serious educational game (SEG) designed for elementary science learners. Previous studies have linked serious gameplay to learning gains and changes in attitudes, yet the rigor of the studies often underwhelms, as the studies lack an adequate sample size, detailed student data, or quality comparison groups. These limitations are compounded in the study of science learning in elementary schools, due to structural difficulties and student variability that impede the implementation of this type of experimentation. This research attends to this knowledge gap, as our team conducted two quasi-experimental studies to explore the learning gains associated with Virtual Vet, a SEG designed to address the fundamental science concepts associated with the human body systems and the subsequent effect of diabetes and obesity related illnesses on the given body systems. In Study 1, students (n = 232) were randomly assigned to play Virtual Vet or participate in guided inquiry lessons that addressed the same objectives. Our study found that students in the game condition outperformed the non-game condition. Based on this finding, we designed Study 2 to compare learning outcomes associated with two conditions: students play only Virtual Vet or students play Virtual Vet and they participate in the guided inquiry activities, which doubled the instructional time for this group. Students (n = 166) were assigned to one of the conditions and we found no significant increase in learning gains for the students who participated in both activities. These results indicate that well-designed SEGs powerfully facilitate and support science learning in elementary settings. 相似文献
30.
Elizabeth A. Thomson Kayla Nuss Ashley Comstock Steven Reinwald Sophie Blake Richard E. Pimentel 《Journal of sports sciences》2019,37(12):1411-1419
This study compared heart rate (HR) measurements for the Fitbit Charge HR 2 (Fitbit) and the Apple Watch devices with HR measurements for electrocardiogram (ECG). Thirty young adults (15/15 females/males, age 23.5 ± 3.0 years) completed the Bruce Protocol. HR measurements were recorded from the ECG and both devices every minute. Average HR for each participant was calculated for very light, light, moderate, vigorous and very vigorous intensities based on ECG-measured HR. A concordance correlation coefficient (CCC) was calculated to examine the strength of the relationship between ECG measured HR and HR measured by each device. Relative error rates (RER) were also calculated to indicate the difference between each device and ECG. An equivalence test was conducted to examine the equivalence of HRs measured by devices and ECG. The Apple Watch showed lower RER (2.4–5.1%) compared with the Fitbit (3.9–13.5%) for all exercise intensities. For both devices, the strongest relationship with ECG-measured HR was found for very light PA with very high CCC (>.90) and equivalence. The strength of the relationship declined as exercise intensity increased for both devices. These findings indicate that the accuracy of real-time HR monitoring by the Apple Watch and Fitbit Charge HR2 is reduced as exercise intensity increases. 相似文献