The oxygen-conserving potential of the diving response: A kinetic-based analysis     

Guillaume Costalat  Jeremy Coquart  Ingrid Castres  Fabrice Joulia  Olivier Sirost  Eric Clua 《Journal of sports sciences》2017,35(7):678-687

We investigated the oxygen-conserving potential of the human diving response by comparing trained breath-hold divers (BHDs) to non-divers (NDs) during simulated dynamic breath-holding (BH). Changes in haemodynamics [heart rate (HR), stroke volume (SV), cardiac output (CO)] and peripheral muscle oxygenation [oxyhaemoglobin ([HbO₂]), deoxyhaemoglobin ([HHb]), total haemoglobin ([tHb]), tissue saturation index (TSI)] and peripheral oxygen saturation (SpO₂) were continuously recorded during simulated dynamic BH. BHDs showed a breaking point in HR kinetics at mid-BH immediately preceding a more pronounced drop in HR (?0.86 bpm.%^?1) while HR kinetics in NDs steadily decreased throughout BH (?0.47 bpm.%^?1). By contrast, SV remained unchanged during BH in both groups (all P > 0.05). Near-infrared spectroscopy (NIRS) results (mean ± SD) expressed as percentage changes from the initial values showed a lower [HHb] increase for BHDs than for NDs at the cessation of BH (+24.0 ± 10.1 vs. +39.2 ± 9.6%, respectively; P < 0.05). As a result, BHDs showed a [tHb] drop that NDs did not at the end of BH (?7.3 ± 3.2 vs. ?3.0 ± 4.7%, respectively; P < 0.05). The most striking finding of the present study was that BHDs presented an increase in oxygen-conserving efficiency due to substantial shifts in both cardiac and peripheral haemodynamics during simulated BH. In addition, the kinetic-based approach we used provides further credence to the concept of an “oxygen-conserving breaking point” in the human diving response.  相似文献   

Book review     

Jeremy Greenland 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1980,26(3):399-401

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Academic advising in baccalaureate distance education programs     

Robert F. Curry  Roger G. Baldwin  Martha Smith Sharpe 《The American journal of distance education》2013,27(3):42-52

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Making policy with ‘good ideas’: policy networks and the ‘intellectuals’ of New Labour     

Leslie Sharpe  S. Gopinathan 《教育政策杂志》2013,28(2):151-166

The educational reforms being enacted in Singapore can be considered exceptional in that they are being undertaken within a highly effective system. We explore these reforms using Brown and Lauder's ideal-typical analysis of ‘neo-Fordist’ and ‘post-Fordist’ models of national economic development. Singapore's reforms have been extensive, ranging from changes to early childhood education through to tertiary education. We examine the nature of state-market relations in education within the context of Singapore's ‘soft authoritarian’ political culture and assess the chances of success of the reforms.  相似文献   

Assertive Discipline and the 1997 Education White Paper: a reply to Rigoni and Walford     

Richard Melling  Jeremy Swinson 《教育政策杂志》2013,28(4):575-579

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Ironic processing and static balance performance in high-expertise performers   总被引：1，自引：0，他引：1  

Dugdale JR  Eklund RC 《Research quarterly for exercise and sport》2003,74(3):348-352

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POLLING AS A MEANS TOWARD PRESIDENTIAL AUTONOMY: EMIL HURJA, HADLEY CANTRIL AND THE ROOSEVELT ADMINISTRATION     

Eisinger  Robert M.; Brown  Jeremy 《Int. Journal of Public Opinion Research》1998,10(3):237-256

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Truth,beauty, and counting     

Jeremy Gray 《Metascience》2010,19(2):211-212

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RESEARCH SECTION: The self‐esteem of pupils in schools for pupils with social,emotional and behavioural difficulties: myth and reality     

Jeremy Swinson 《British Journal of Special Education》2008,35(3):165-172

The self‐esteem of pupils has long been regarded as a key variable affecting both pupils' learning and behaviour, although the relationship between the two may not be as strong as many in education have always assumed. In this article, Jeremy Swinson, an educational psychologist and honorary lecturer in educational psychology at Liverpool John Moores University, reports the findings from a study in two parts. Firstly, an examination was made of 35 Statements written by officers from seven different education authorities in the north‐west of England for pupils attending two independent schools that specialise in working with pupils with social, emotional and behavioural difficulties (SEBD). It was found that, of the 35 Statements examined, 34 included self‐esteem as one area of special need. The second phase of the study examined the self‐esteem of 60 pupils in four specialist schools for pupils with social, emotional and behavioural difficulties. The results showed that the average scores for self‐esteem for both the primary and secondary sample were very similar to the scores obtained by previous researchers in mainstream schools. However, it was apparent that more pupils than expected appeared to have either very low or very high self‐esteem. In terms of locus of control, it was found that a large number of secondary pupils had a high score although this was not found to be the case for the primary pupils in the sample. Jeremy Swinson discusses these results and presents his analysis of their implications for teachers, educational psychologists and education officers.  相似文献   

Influence of sex and specialty on the prediction of middle-distance running performances using the Mercier et al.’s nomogram     

Jeremy B. Coquart  Daniel Mercier  Montassar Tabben  Laurent Bosquet 《Journal of sports sciences》2015,33(11):1124-1131

The aim was to test the influence of sex and specialty (3000, 5000 and 10000 m) on the validity of middle-distance running performance predictions obtained from the Mercier et al.’s nomogram. Consequently, we examined all official French track running rankings for the 3000-, 5000- and 10000-m events (men and women) from 2006 to 2012. A scoring table was used to determine the runners’ specialties. Only runners who performed in the three distance events within the same year were included (75 women and 400 men). The Mercier et al.’s nomogram was used to predict one running performance from the other two. The results showed no significant difference between actual and predicted running performances (P = 0.77). Female runners had significantly lower performances than male runners (P < 0.001). Specialty did not influence performances (P = 0.11). Very high correlations were found between actual and predicted performances (0.91 < r < 0.99), with the exception of women (r = 0.85) in 5000 m. Moreover, low limits of agreement were obtained for male and female runners, whatever the specialty. These results support the validity of the nomogram to predict running performance in the 3000-, 5000- and 10000-m events for male and female runners, whatever the specialty. The predicted running performances may be used in training programmes (e.g., to prescribe tempo runs) and competitions (e.g., to establish split times).  相似文献