Predictive ability of the medicine ball chest throw and vertical jump tests for determining muscular strength and power in adolescents     

Daniel A. Hackett  Timothy B. Davies  Denis Ibel  Stephen Cobley  Ross Sanders 《Measurement in physical education and exercise science》2018,22(1):79-87

This study examined the predictive ability of the medicine ball chest throw and vertical jump for muscular strength and power in adolescents. One hundred and ninety adolescents participated in this study. Participants performed trials of the medicine ball chest throw and vertical jump, with vertical jump peak power calculated via an estimation equation. One-repetition maximum and peak power for the chest press and leg press were assessed using pneumatic exercise machines. The medicine ball chest throw strongly correlated with chest press one-repetition maximum and peak power, while the vertical jump peak power strongly correlated with leg press one-repetition maximum and peak power. The predictive ability of medicine ball chest throw was better than vertical jump peak power for muscular strength and power when controlling for sex, age, height, weight, and maturation, and was not affected by involvement in sports. Results show good predictive ability of the medicine ball chest throw for muscular strength and power in adolescents, while predictable ability of vertical jump peak power is weakened when other factors are taken into account.  相似文献   

Analysing a cycling grand tour: Can we monitor fatigue with intensity or load ratios?     

Dajo Sanders  Mathieu Heijboer  Matthijs K. C. Hesselink  Tony Myers  Ibrahim Akubat 《Journal of sports sciences》2018,36(12):1385-1391

This study evaluated the changes in ratios of different intensity (rating of perceived exertion; RPE, heart rate; HR, power output; PO) and load measures (session-RPE; sRPE, individualized TRIMP; iTRIMP, Training Stress Score?; TSS) in professional cyclists. RPE, PO and HR data was collected from twelve professional cyclists (VO_2max 75 ± 6 ml?min?kg^?1) during a two-week baseline training period and during two cycling Grand Tours. Subjective:objective intensity (RPE:HR, RPE:PO) and load (sRPE:iTRIMP, sRPE:TSS) ratios and external:internal intensity (PO:HR) and load (TSS:iTRIMP) ratios were calculated for every session. Moderate to large increases in the RPE:HR, RPE:PO and sRPE:TSS ratios (d = 0.79–1.79) and small increases in the PO:HR and sRPE:iTRIMP ratio (d = 0.21–0.41) were observed during Grand Tours compared to baseline training data. Differences in the TSS:iTRIMP ratio were trivial to small (d = 0.03–0.27). Small to moderate week-to-week changes (d = 0.21–0.63) in the PO:HR, RPE:PO, RPE:HR, TSS:iTRIMP, sRPE:iTRIMP and sRPE:TSS were observed during the Grand Tour. Concluding, this study shows the value of using ratios of intensity and load measures in monitoring cyclists. Increases in ratios could reflect progressive fatigue that is not readily detected by changes in solitary intensity/load measures.  相似文献   

A systematic review of propulsion from the flutter kick – What can we learn from the dolphin kick?     

Jordan T. Andersen  Ross H. Sanders 《Journal of sports sciences》2018,36(18):2068-2075

Propulsion, one of the most important factors in front crawl swimming performance, is generated from both the upper and lower limbs, yet little is known about the mechanisms of propulsion from the alternating movements of the lower limbs in the flutter kick (FK). The purpose of this systematic review was to review the literature relating to the mechanisms of propulsion from FK in front crawl. There was limited information about the mechanisms of propulsion in FK. Since movements of the lower limbs are similar between FK and the dolphin kick (DK), mechanisms of propulsion from DK were reviewed to better understand propulsion from FK. Recent evidence suggests that propulsion in DK is generated in conjunction with formation and shedding of vortices. Similar vortex structures have been observed in FK. Visualisation and simulation techniques, such as particle image velocimetry (PIV) and computational fluid dynamics (CFD), are non-invasive tools that can effectively model water flow without impacting swimming technique. These technologies allow researchers to estimate the acceleration of water and, consequently, the propulsive reaction forces acting on the swimmer. Future research should use these technologies to investigate propulsion from FK.  相似文献   

Stakeholder Identification of Barriers and Facilitators to Sexual Health Education for Female Survivors of Violence: A Mixed Methods Study     

Brooke E. E. Montgomery  S. Alexandra Marshall  Sharon E. Sanders  Martha M. Phillips  Michelle Cline  Max Snowden 《American journal of sexuality education》2018,13(1):18-39

There is a strong relationship between experiencing violence and participating in behaviors that increase the risk of contracting sexually transmitted infections. Sexual health education (SHE) tailored to the unique needs of female survivors of violence is needed. This paper presents findings from 40 surveys and 33 accompanying interviews with stakeholders representing 31 agencies in the violence advocacy community in Arkansas to investigate the feasibility, acceptability, and perceived need of a SHE program for female survivors of violence. Data also explore the role and preferences of community agencies in the design and implementation of such a program. Interviews with stakeholders revealed three themes: intervention concerns, content, and structure.  相似文献   

Performance intervention maps: 36 strategies for solving your organization's problems     

Ethan S. Sanders  Sivasailam Thiagi Thiagarajan  Debra Haney 《Performance Improvement》2002,41(3):44-47

  相似文献   

Evaluating the effectiveness of KooLKIDS: An interactive social emotional learning program for Australian primary school children     

Annemaree Carroll  Molly McCarthy  Stephen Houghton  Emma Sanders O'Connor 《Psychology in the schools》2020,57(6):851-867

The effectiveness of universal social emotional learning (SEL) programs are dependent on the incorporation of best practice principles, including an evaluative component. In the present study, the effects of a best practice, teacher-led SEL program was examined with 854 children aged 8–12 years. KooLKIDS uses an interactive multimedia format and animated character to help children develop their emotion regulation capacities, social and friendship skills, empathy and compassion for others, and self-esteem. A quasi-experimental waitlist-control design was used to examine the impact of KooLKIDS on social and emotional competence, behavioral and emotional problems, academic achievement and effort. Hierarchical linear modeling demonstrated significant increases in social and emotional competence, and reductions in internalizing and externalizing problems in children post KooLKIDS program in the intervention group. The findings suggest that KooLKIDS has strong potential as a teacher-led, classroom-based, structured program for enhancing children's social and emotional learning.  相似文献   

The betrayal: the 1919 World Series and the birth of modern baseball     

Precious Sanders 《Sport in History》2017,37(4):557-560

  相似文献   

Timing and Intensity of Tutoring: A Closer Look at the Conditions for Effective Early Literacy Tutoring     

Patricia F. Vadasy  Elizabeth A. Sanders  Julia A. Peyton  Joseph R. Jenkins 《Learning disabilities research & practice》2002,17(4):227-241

In this article we report data from a longitudinal study of one–to–one tutoring for students at risk for reading disabilities. Participants were at–risk students who received phonics–based tutoring in first grade, students who were tutored in comprehension skills in second grade, and students tutored in both grades 1 and 2. At second–grade posttest, there were significant differences in word identification and word attack between students who were tutored in first grade only compared to students who were also tutored in second grade, favoring students who were tutored in first grade only. Overall, there were no advantages to a second year of tutoring. For students tutored in second grade only, there were no differences at second–grade posttest compared to controls. Schools may have selected students who did not respond to first–grade tutoring for continued tutoring in second grade. Findings are discussed in light of decisions schools make when using tutors to supplement reading instruction for students with reading difficulties.  相似文献   

Library automation at the Polytechnic of the South Bank: (Case Studies in Library Automation). D.F.W. Hawes and D.A. Botten. Library Association,England; distributed in North America by Oryx Press (1983). 132 pp., $25.00, ISBN 0-85365-944-3.     

Jill Sanders 《Information processing & management》1985,21(3):261

  相似文献   

Equivalent but not the Same: Teaching and Learning in Full Semester and Condensed Summer Courses     

Katharine P. Walsh  Megan Sanders  Soniya Gadgil 《College Teaching》2019,67(2):138-149

Research on teaching and learning in condensed-course formats is varied and difficult to generalize. We analyze this research and identify factors that may account for the varied findings. Additionally, we present a mixed methodology study of 20 matched-pair courses (i.e., full and condensed formats) from 11 disciplines which examines student learning and student and faculty perception data. We find that faculty and students perceive condensed courses as more effective, but that student learning varies depending upon the measures used to assess it. We conclude by considering the implications of our study for teaching and assessment practices.  相似文献