Validating the Sedentary Sphere method in children: Does wrist or accelerometer brand matter?     

Liezel Hurter  Alex V. Rowlands  Stuart J. Fairclough  Karl C. Gibbon  Zoe R. Knowles  Lorna A. Porcellato 《Journal of sports sciences》2019,37(16):1910-1918

This study aimed to validate the Sedentary Sphere posture classification method from wrist-worn accelerometers in children. Twenty-seven 9–10-year-old children wore ActiGraph GT9X (AG) and GENEActiv (GA) accelerometers on both wrists, and activPAL on the thigh while completing prescribed activities: five sedentary activities, standing with a phone, walking (criterion for all 7: observation) and 10-min free-living play (criterion: activPAL). In an independent sample, 21 children wore AG and GA accelerometers on the non-dominant wrist and activPAL for two days of free-living. Per cent accuracy, pairwise 95% equivalence tests (±10% equivalence zone) and intra-class correlation coefficients (ICC) analyses were completed. Accuracy was similar, for prescribed activities irrespective of brand (non-dominant wrist: 77–78%; dominant wrist: 79%). Posture estimates were equivalent between wrists within brand (±6%, ICC > 0.81, lower 95% CI ≥ 0.75), between brands worn on the same wrist (±5%, ICC ≥ 0.84, lower 95% CI ≥ 0.80) and between brands worn on opposing wrists (±6%, ICC ≥ 0.78, lower 95% CI ≥ 0.72). Agreement with activPAL during free-living was 77%, but sedentary time was underestimated by 7% (GA) and 10% (AG). The Sedentary Sphere can be used to classify posture from wrist-worn AG and GA accelerometers for group-level estimates in children, but future work is needed to improve the algorithm for better individual-level results.  相似文献   

A modified TRIMP to quantify the in-season training load of team sport players   总被引：1，自引：1，他引：0  

Stagno KM  Thatcher R  van Someren KA 《Journal of sports sciences》2007,25(6):629-634

The aims of the study were to modify the training impulse (TRIMP) method of quantifying training load for use with intermittent team sports, and to examine the relationship between this modified TRIMP (TRIMP(MOD)) and changes in the physiological profile of team sport players during a competitive season. Eight male field hockey players, participating in the English Premier Division, took part in the study (mean+/-s: age 26+/-4 years, body mass 80.8+/-5.2 kg, stature 1.82+/-0.04 m). Participants performed three treadmill exercise tests at the start of the competitive season and mid-season: a submaximal test to establish the treadmill speed at a blood lactate concentration of 4 mmol . l(-1); a maximal incremental test to determine maximal oxygen uptake ([V]O(2max)) and peak running speed; and an all-out constant-load test to determine time to exhaustion. Heart rate was recorded during all training sessions and match-play, from which TRIMP(MOD) was calculated. Mean weekly TRIMP(MOD) was correlated with the change in [V]O(2max) and treadmill speed at a blood lactate concentration of 4 mmol x l(-1) from the start of to mid-season (P<0.05). The results suggest that TRIMP(MOD) is a means of quantifying training load in team sports and can be used to prescribe training for the maintenance or improvement of aerobic fitness during the competitive season.  相似文献   

On the varieties of permanent way,practically in use on railways     

W.Bridges Adams 《Journal of The Franklin Institute》1857,64(1):13-15

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The construction,traction, retardation,safety, and police of railway trains     

W.Bridges Adams 《Journal of The Franklin Institute》1865

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On the expansion of brickwork, (considered with reference to the chimney shaft,at Mr. Cubitt's works,at Pimlico)     

W. Bridges 《Journal of The Franklin Institute》1845,40(3):145-149

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Book reviews     

Sixten Marklund  Franz Hilker  Marjorie L. Jenkins  Franklin Parker  Gustav Jahoda  M. J. Langeveld  Karl Henrik Eriksson  Nicholas Hans  Gilbert de Landsheere  Leslie D. Mclean  J. Cambon  A. St. Langeland  S. Wiegersma  Richard F. Goodings  J. B. Biggs 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1966,12(2):221-251

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Performance appraisal as naturalistic inquiry: a report of the Fourth Cambridge Conference on Educational Evaluation     

David Bridges  John Elliott  Carol Klass 《Cambridge Journal of Education》1986,16(3):221-233

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Responses to austerity: European experiences from higher education and school improvement in the 1980s     

Karl Frey  Uwe Hameyer 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1988,34(3):371-378

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Transforming the CIP Data Block: Assessing User Needs to Re-envision a Venerable Library Icon     

Karl Debus-López  Marilyn McCroskey  Regina Romano Reynolds  Caroline Saccucci  Camilla Williams  Michele Zwierski 《Cataloging & classification quarterly》2017,55(7-8):522-548

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Beyond Reflection: Perception,virtue, and teacher knowledge     

Karl D. Hostetler 《Educational Philosophy and Theory》2016,48(2):179-190

In this article, I aim to vindicate the belief that many teachers have that their intuitions, insights, or perceptions are legitimate—and indispensible—guides for their teaching. Perceptions can constitute knowledge. This runs counter to some number of views that emphasize ‘reflective practice’ and teachers as ‘reflective practitioners.’ I do not deny that reflection can be important, but it is a derivative task, dependent on teachers being the ‘right sort of subject,’ having the ‘right orientation’ to their work, at the service of achieving that orientation. That orientation is a matter of virtue, where virtue is manifested in the capacity to read situations correctly for what is required to serve persons’ welfare, for them to do well. This entails that good teaching is more experienced-based than research-based. Ultimately, it is life experience that provides for teachers’ ability to see well.  相似文献