Time of day and short-duration high-intensity exercise influences on coagulation and fibrinolysis

Exercise has been demonstrated to have considerable effects upon haemostasis, with activation dependent upon the duration and intensity of the exercise bout. In addition, markers of coagulation and fibrinolysis have been shown to possess circadian rhythms, peaking within the morning (0600–1200?h). Therefore, the time of day in which exercise is performed may influence the activation of the coagulation and fibrinolytic systems. This study aimed to examine coagulation and fibrinolytic responses to short-duration high-intensity exercise when completed at different times of the day. Fifteen male cyclists (VO_2max: 60.3?±?8.1?ml?kg^?1?min^?1) completed a 4-km cycling time trial (TT) on five separate occasions at 0830, 1130, 1430, 1730 and 2030. Venous blood samples were obtained pre- and immediately post-exercise, and analysed for tissue factor (TF), tissue factor pathway inhibitor (TFPI), thrombin–anti-thrombin complexes (TAT) and D-Dimer. Exercise significantly increased plasma concentrations of TF (p?p?p?p?p?=?.004) and TFPI (p?=?.031), with 0830 greater than 1730 (p .001), while 1730 was less than 2030?h (p?=?.008), respectively. There was no significant effect of time of day for TAT (p?=?.364) and D-Dimer (p?=?.228). Power output, TT time and heart rate were not significantly different between TTs (p?>?.05); however, percentage VO_2max was greater at 1730 when compared to 2030 (p?=?.04). Due to a time-of-day effect present within TF, peaking at 0830, caution should be applied when prescribing short-duration high-intensity exercise bout within the morning in populations predisposed to hypercoagulability.     

Movement pattern and physiological response in recreational small-sided football – effect of number of players with a fixed pitch size

Recreational soccer is an effective health-promoting activity, but it is unclear how different game formats influence internal and external load. Thus, to be able to advise how to maximise the outcome of recreational football, we examined movement pattern and physiological response in 11 untrained men (32.6 ± 6.7 yrs, 23.3 ± 4.9 fat%, 43.4 ± 5.3 ml·min^?1·kg^?1) during three football sessions comprising 4 × 12 min of 3v3, 5v5 or 7v7 with a constant pitch size of 20 × 40 m. Movement pattern, heart rate (HR), blood lactate and RPE were measured during and after the 12-min periods. Greater (P < 0.05) total distance and high-speed distance was covered during 3v3 than 5v5 (14 and 30%) and 7v7 (15 and 75%). Mean HR was higher in 3v3 (85.7 ± 5.7%HRmax) and 5v5 (84.2 ± 5.1%HRmax) than in 7v7 (80.7 ± 4.6%HRmax, P < 0.05) and percentage time >90%HR was higher in 3v3 (43 ± 18%, P < 0.05) than in 5v5 (28 ± 21%) and 7v7 (18 ± 14%). Blood lactate was higher in 3v3 (7.4 ± 2.7 mmol·l^?1) than in 7v7 (4.5 ± 2.2 mmol·l^?1, P < 0.001) but not in 5v5 (6.1 ± 2.1 mmol·l^?1, P = 0.061). RPE was higher in 3v3 (6.7 ± 2.3, P < 0.01) than in 5v5 (5.2 ± 2.2) and 7v7 (4.3 ± 2.3). In conclusion, higher external and internal load was found with fewer players, when the pitch size is fixed.     

Neoliberal contradictions in two private niches of educational ‘choice’

This article brings together ethnographies of two privileged educational settings in the United States – a private school in California’s Central Valley following the progressivist Sudbury model, and an affluent New England boarding school’s summer enrichment program. Each of these institutions serves as an alternative to and/or extension of publicly accessible education institutions during a neoliberal era of marketization and growing educational inequality. By comparing findings from ethnographic studies of each institution, we find that both celebrate open access and socially responsible pedagogical values in ways that obscure mechanisms of exclusion and an entrenched individualist ideology. We discuss two particular contradictions that manifest in both settings: first, a discourse of openness and inclusivity that belies the ways in which access is mediated by constructions of who best ‘fits’ the special learning community; and second, an outspoken allegiance to socially engaged values of diversity and democracy that belies the ways in which these values are commodified and appropriated for students’ individual advantage(s). In comparing such sites, we argue for the importance of tracing the mechanisms of advantage in under-researched ‘niches’ of the dynamically shifting and unequally accessed neoliberal marketplace for educational opportunity.     

Trust-building in the mentoring of students of color

Trust is a vital component of mentoring, particularly when protégés are people of color who have experienced racism and discrimination. My findings are part of a larger study that culminated in the formulation of a theory of multicultural mentoring. Trust was found to be foundational for successful multicultural mentoring relationships. In my study of how mentors establish trust with graduate protégés of color, the following mentor practices were found to promote trust: listening, maintaining excellent communication, having a holistic understanding of the protégé, self-disclosing, using humor, being willing to discuss race and culture, acknowledging mistakes, and behaving with integrity. The mentors not only worked to establish interpersonal trust, they also attended to institutional and sociocultural trust concerns that impacted their protégés. Considerable time, skill, commitment, and effort are required for mentors to establish trust with protégés of color. Recommendations for the provision of mentor support are provided.     

“Behind the Words”: Negotiating Literal/Figurative Sense When Translating the Lyrics to a Children’s Song in Bilingual Preschool

This study investigates how 6- to 7-year-old children in a bilingual preschool together with their teachers take on the challenge of translating the lyrics to a children’s song from Finnish to English. With an interest in how translation activities can engage children in communication and metacommunication, and facilitate the development of linguistic and metalinguistic awareness, how a decisive matter of translation – that of taking an utterance literally and/or metaphorically – is negotiated among participants is more specifically scrutinized. The study takes a sociocultural theoretical perspective on learning and communication. The study shows how this kind of activity allows teachers to scaffold children engaging in talk about linguistic and metalinguistic matters, pivotal to their language development and comprehension of this kind of text.     

Testing the usability of a portable DVD player and tailored photo instructions with older adult veterans

DVD-delivered behavioral skills training may help disseminate efficacious treatments to older adults independent of internet access. The present study examined the usability of a portable DVD player alongside iterative revisions of accompanying instructions to be used by older adults in a DVD-delivered behavioral skills treatment study. The sample comprised 20 older adults with a mean age of 69.5 years (SD = 7.3). Behavior observations revealed that three of five steps to play the DVD were completed by more than 90% of participants. Quantitative ratings revealed that 75% could play the DVD easily. Qualitative content analysis further elucidated the usability of the player and the clarity of the instructions. Findings suggest user-centered design of instructional support in DVD-delivered treatments for older adults may be critical to minimizing user error and frustration and increase user experience.