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Achraf Ammar Hamdi Chtourou Khaled Trabelsi Johnny Padulo Mouna Turki Kais El Abed 《Journal of sports sciences》2015,33(4):358-368
The aim of this study was to investigate the performance of an Olympic-Weightlifting session training at three times of the day on the performance related to biochemical responses. Nine weightlifters (21 ± 0.5 years) performed, in randomised order, on three Olympic-Weightlifting training (snatch, clean and jerk) sessions (08:00 a.m., 02:00 p. m., 06:00 p. m.). Blood samples were collected: before, 3 min and 48 h after each training session. Haematological parameters and markers of muscle injury were assessed. Resting oral temperature and rating of perceived exertion (RPE) were also assessed during each session. ANOVA showed that the performance was better (P < 0.001) at 02:00 p. m. with a less RPE (P < 0.01) compared to the morning and the evening sessions while there was higher (P < 0.05) oral temperature at 06:00 p. m. versus 08:00 a.m. and 02:00 p. m. Muscle damage changed immediately (without significant effect after 48 h) after the training sessions with lower values ??in the evening compared to the morning. In conclusion, the afternoon training is more effective than morning or evening sessions for weightlifters. Therefore, coaches and weightlifters should be advised to schedule their training session in the afternoon hour. 相似文献
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Ammar Al-Ghabban 《Pastoral Care in Education》2018,36(3):176-188
ABSTRACTOur current social and political context is awash with pronouncements about the growing number of children and young people with mental health issues. This paper explores how school culture that is founded upon a compassion framework is well placed to support the promotion of pupils’ mental health and well-being. Drawing upon experiences of being a senior leader in a specialist social, emotional and mental health (SEMH) educational setting and of supporting a wide range of mainstream schools in the area of SEMH and well-being, this paper outlines some of the conflicting interests and ubiquitous tensions that present challenges in the contemporary UK education system. Conceptualisations of compassion and other relevant theoretical perspectives are referred to in order to illustrate how the, often, at times, competing needs of different constituencies (pupils, teaching and non-teaching staff, management, parents and carers) within school communities are best served when disentangled from each other and addressed with attention and clarity. 相似文献
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Managing personal information such as to-dos and contacts has become our daily routines, consuming more time than needed. Existing PIM tools require extensive involvement of human users. This becomes a problem in using mobile devices due to their physical constraints. To address the limitations of traditional PIM tools, we propose a model of mobile PIM agent (PIMA) that aims to improve PIM on mobile devices through natural language interface and application integration. We conducted a user study to evaluate PIMA empirically with prototype systems. The results show that mobile PIMA improved perceived usefulness, ease-of-use, and efficiency of PIM on mobile devices, which in turn accounted for positive attitude and intention to use the system. The findings of this study provide suggestions for designing and developing PIM applications on mobile devices. 相似文献
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The development of spelling skill is a very difficult task for students with dyslexia. Spelling in French involves the consideration of various types of knowledge, procedures and strategies. This study aims to describe the spelling strategies of 32 dyslexic students (DYS) aged from 8 to 12 years and to establish links between spelling strategies and spelling skill. Students had to spell 24 dictated words and provide comments on the strategy employed for each word. The performances of DYS were compared to 25 children of the same chronological age (CA) and of 24 children of the same reading age (RA). The results show that phonological strategies are the most commonly used by all groups of participants. If no particular strategy is related to the spelling skill of DYS, visuo-orthographic strategy generally accounts for the spelling skill results of CA and RA. 相似文献
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Achraf Ammar Bryan L. Riemann Liwa Masmoudi Marcel Blaumann Osama Abdelkarim Anita Hökelmann 《Journal of sports sciences》2018,36(12):1319-1330
The aim of the present study was to investigate loading effects on kinematic and kinetic variables among elite-weightlifters in order to identify an optimal training load to maximize power production for clean-movement. Nine elite-weightlifter (age: 24 ± 4years, body-mass: 77 ± 6.5kg, height: 176 ± 6.1cm and 1RM clean: 170 ± 5kg) performed 2 separate repetitions of the clean using 85, 90, 95% and 100%, in a randomized order, while standing on a force platform and being recorded using 3D-capture-system. Differences in kinematics (barbell displacement, velocity and acceleration) and kinetics (power, vertical ground reaction force (vGRF), rate of force development (RFD), and work) across the loads were statistically assessed. Results revealed significant load effects for the majority of the studied parameters (p < 0.01) and showed that typical bar-displacement, greatest bar-velocity and peak-power were achieved at 85 and 90% 1RM (p < 0.001). Additionally greater average power was shown for 90 and 95% (p < 0.01) and greater work and vGRF were shown for 90, 95 and 100% than 85% 1RM (p < 0.05). Load had no significant effect on peak-vGRF and peak-RFD (p > 0.05). The results of this study, suggest 90% 1RM to be the most advantageous load to train explosive-force and to enhance power-outputs while maintaining technical efficiency in elite-weightlifters. 相似文献
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OBJECTIVES: This cross-sectional survey was conducted to evaluate the awareness and actual professional experience of pediatricians in Kuwait regarding child maltreatment, a topic rarely explored in this part of the world. METHODS: Data were obtained from all pediatricians in public hospitals with pediatric emergency services using a structured detailed self-completed questionnaire. RESULTS: The experience of child neglect was more common than that of child abuse in the clinical practice of surveyed pediatricians. Fifty percent of 117 pediatricians (69% of all eligible) reported having encountered at least 1 case of abuse and up to 3 cases of neglect in the past year. Women and younger doctors more commonly recognized hypothetical situations as maltreatment, and believed child abuse and neglect as being common or very common in Kuwait. Other demographic or professional variables did not affect recognition of maltreatment. Participants would most likely alert social workers about suspected maltreatment cases. More than 80% did not know whether there is a legal obligation to report or which legal authorities should receive reports of suspected cases. DISCUSSION AND CONCLUSIONS: National ethical guidelines regarding reporting suspected cases of maltreatment must be established. Laws protecting maltreated children and reporting physicians must be immediately enacted. Additional training is required to help pediatricians, especially expatriates from other cultures, to diagnose with certainty cases of child maltreatment in their practice in Kuwait. 相似文献
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