Repeated exercise stress impairs volitional but not magnetically evoked electromechanical delay of the knee flexors

The effects of serial episodes of fatigue and recovery on volitional and magnetically evoked neuromuscular performance of the knee flexors were assessed in 20 female soccer players during: (i) an intervention comprising 4 × 35 s maximal static exercise, and (ii) a control condition. Volitional peak force was impaired progressively (-16% vs. baseline: 235.3 ± 54.7 to 198.1 ± 38.5 N) by the fatiguing exercise and recovered to within -97% of baseline values following 6 min of rest. Evoked peak twitch force was diminished subsequent to the fourth episode of exercise (23.3%: 21.4 ± 13.8 vs. 16.4 ± 14.6 N) and remained impaired at this level throughout the recovery. Impairment of volitional electromechanical delay performance following the first episode of exercise (25.5%: 55.3 ± 11.9 vs. 69.5 ± 24.5 ms) contrasted with concurrent improvement (10.0%: 24.5 ± 4.7 vs. 22.1 ± 5.0 ms) in evoked electromechanical delay (P < 0.05), and this increased disparity between evoked and volitional electromechanical delay remained during subsequent periods of intervention and recovery. The fatiguing exercise provoked substantial impairments to volitional strength and volitional electromechanical delay that showed differential patterns of recovery. However, improved evoked electromechanical delay performance might identify a dormant capability for optimal muscle responses during acute stressful exercise and an improved capacity to maintain dynamic joint stability during critical episodes of loading.     

Mentoring in black and white: the intricacies of cross‐cultural mentoring

Cross‐cultural mentoring relationships can be sites of struggle around the issues of race, class and gender. In addition, the mentor/protégé relationship offers micro‐cosmic insight into power relations within western society. The authors of this paper, a black woman associate professor and a white male professor, use the example of their mentoring relationship to illustrate six common issues facing academicians involved in these relationships: (1) trust between mentor and protégé; (2) acknowledged and unacknowledged racism; (3) visibility and risks pertinent to minority faculty; (4) power and paternalism; (5) benefits to mentor and protégé; and (6) the double‐edged sword of ‘otherness’ in the academy. Literature is used for review and critique of mentoring in the academy while offering personal examples to illustrate the complexity and success of a 13‐year mentoring relationship between a duo who began their association as teacher/student.     

A review of literacy frameworks for learning environments design

This article charts the development of three literacy research frameworks: multiliteracies, new literacies, and popular literacies. By reviewing the literature surrounding three current conceptions of literacy, an attempt is made to form an integrative grouping that captures the most relevant elements of each for learning environments design. Rather than showcasing the merits and weaknesses of each perspective (resulting in theoretical ‘winners and losers’), the frameworks are used to derive a core set of principles which might inform the design of interventions and artifacts to promote learning within informal learning environments for youth. These principles include exploring lifeworlds, recognising sources of power, multimodality, intertextuality, play and popular culture, design and production, and changing roles for adults.     

SPRINGFIELD RULING UPSET

On January 15, 1965, U.S. District Judge George C. Sweeney ruled that the Springfield, Mass, school board was constitutionally obligated to “eliminate to the fullest extent possible racial concentration in its elementary and junior high schools within the framework of effective educational procedures . . . “’ [See text of ruling in Integrated Education, April‐May, 1965, pp. 44‐46 For background, see Integrated Education, December, 1964‐January, 1965, p. 7.] The school board appealed.     

A Socioecological View of Higher-Performing Diverse Elementary Schools

This multiple case study relied upon a socioecological framework and the lens of resilience to investigate practices and processes that are correlated with higher academic achievement among African American, Hispanic, and English language learners. Utilizing quantitative measures for sample selection of 10 higher-performing and 5 average-performing schools and qualitative data collection and analysis methods, findings indicate that 4 interrelated practices characterize higher-performing diverse schools: close engagement with and understanding of the student population; intensive literacy- and technology-enriched instruction; a collaborative and iterative approach to curriculum revision and data use; and fluid adaptation and deployment of resources. One of the 15 diverse high-poverty case study schools is discussed in detail as an exemplar. The findings from this study suggest that research cutting across levels of classrooms, schools, and districts sheds light on the interrelated proximal and distal processes that promote resilience and higher academic achievement among ethnically and linguistically diverse students.     

Fluency Has a Role in the Simple View of Reading

The Simple View of Reading (SVR) suggests that the components of reading comprehension are decoding and linguistic comprehension. Given research that suggests that fluency is a separate construct from decoding and linguistic comprehension in fourth grade, the aim of this study was to examine the role of fluency in the SVR model. Analyses of data from 248 fourth-grade children explored whether the influence of fluency on reading comprehension is direct or whether fluency plays an indirect role on reading comprehension as a mediator or moderator of decoding. Structural equation modeling and latent regression analyses revealed that reading fluency plays a mediating role in explaining the relation between decoding and reading comprehension. This novel finding is placed in the context of studies that reported either a direct effect or no effect of reading fluency in SVR.     

The effect of exercise interventions on resting metabolic rate: A systematic review and meta-analysis

ABSTRACT

The systematic review and meta-analysis evaluated the effect of aerobic, resistance and combined exercise on RMR (kCal·day^-1) and performed a methodological assessment of indirect calorimetry protocols within the included studies. Subgroup analyses included energy/diet restriction and body composition changes. Randomized control trials (RCTs), quasi – RCTs and cohort trials featuring a physical activity intervention of any form and duration excluding single exercise bouts were included. Participant exclusions included medical conditions impacting upon RMR, the elderly (≥65 years of age) or pregnant, lactating or post-menopausal women. The review was registered in the International Prospective Register of Systematic Reviews (CRD 42,017,058,503). 1669 articles were identified; 22 were included in the qualitative analysis and 18 were meta-analysed. Exercise interventions (aerobic and resistance exercise combined) did not increase resting metabolic rate (mean difference (MD): 74.6 kCal·day^-1[95% CI: ?13.01, 161.33], P = 0.10). While there was no effect of aerobic exercise on RMR (MD: 81.65 kCal·day^-1[95% CI: ?57.81, 221.10], P = 0.25), resistance exercise increased RMR compared to controls (MD: 96.17 kCal·day^-1[95% CI: 45.17, 147.16], P = 0.0002). This systematic review effectively synthesises the effect of exercise interventions on RMR in comparison to controls; despite heterogenous methodologies and high risk of bias within included studies.     

Deep Dive into KBART

ABSTRACT

The Deep Dive into KBART preconference workshop provided a comprehensive overview of the National Information Standards Organization Knowledge Bases and Related Tools (KBART) Phase II Recommended Practice (http://www.niso.org/publications/rp/rp-9–2014/). The workshop was divided into four sections. The first provided an overview of the background, purpose, and value of KBART to all members of the information supply chain. The next section focused on the basic guidelines for effective exchange of metadata with knowledgebases, including method of exchange, data format, file naming conventions, and frequency of exchange. The remaining two sections of the workshop addressed the correct use of KBART data fields, first in relation to serials and then to monographs. Through classroom instruction, interactive quizzes, and hands-on exercises, the workshop provided in-depth coverage of all KBART data elements, with special focus on many of the most frequently asked questions about the recommended practice.