Metabolic optimisation of the basketball free throw     

Johnny Padulo  Giuseppe Attene  Gian Mario Migliaccio  Francesco Cuzzolin  Stefano Vando 《Journal of sports sciences》2015,33(14):1454-1458

The free throw (FT) is a fundamental basketball skill used frequently during a match. Most of actual play occurs at about 85% of maximum heart rate (HR). Metabolic intensity, through fatigue, may influence a technically skilled move as the FT is. Twenty-eight under 17 basketball players were studied while shooting FTs on a regular indoor basketball court. We investigated FT accuracy in young male basketball players shooting at three different HRs: at rest, at 50% and at 80% of maximum experimentally obtained HR value. We found no significant FT percentage difference between rest and 50% of the maximum HR (FT percentage about 80%; P > 0.05). Differently, at 80% of the maximum HR the FT percentage decreased significantly by more than 20% (P < 0.001) down to about 60%. No preliminary warm-up is needed before entering game for the FT accuracy. Furthermore, we speculate that time-consuming, cooling-off routines usually performed by shooters before each FT may be functional to improve its accuracy.  相似文献   

Identification of biomedical journals in Spain and Latin America     

Xavier Bonfill  Dimelza Osorio  Margarita Posso  Ivan Sol  Gabriel Rada  Ania Torres  Marcelo García Dieguez  Maricela Pia‐Pozas  Luisa Díaz‐García  Mario Tristn  Omar Gandarilla  David A. Rincn‐Valenzuela  Arturo Martí  Ricardo Hidalgo  Daniel Simancas‐Racines  Luis Lpez  Ricardo Correa  Antonieta Rojas‐De‐Arias  Csar Loza   scar Gianneo  Hector Pardo   《Health information and libraries journal》2015,32(4):276-286

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CAI: RESEARCH AND REALITY     

Mario Fantini 《Review of Education, Pedagogy & Cultural Studies》2013,35(1):73-77

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Desarrollo intelectual durante la adolescencia: Competencia,actuación y diferencias individuales     

Mario Carretero 《Infancia y Aprendizaje》2013,36(12):81-98

Resumen

Este artículo presenta una revisión de los trabajos sobre el pensamiento formal, realizados entre 1970 y 1980, centrándose en tres aspectos fundamentales: estilos cognitivos, desfases horizontales y la influencia del contenido de las tareas formales. En cuanto al primero de estos aspectos se revisan los trabajos que muestran a los sujetos independientes de campo tienen más facilidad que los dependientes de campo para producir una actuación formal. Se analizan brevemente las estrategias que realizan estos dos tipos de sujetos. En lo que se refiere al problema de los desfases horizontales se presentan resultados de trabajos que muestran como tareas con la misma estructura formal se resuelven en distintos momentos del desarrollo. Por ultimo se revisan trabajos que han demostrado cómo influye en la resolución de los problemas formales, la familiaridad que los sujetos tengan con ellos. Este artículo se ha estructurado, en parte, siguiendo algunas de las ideas de la teona neopiagetiana de los operadores constructivos de Pascual-Leone.  相似文献   

Determination of the prevalence of anabolic steroids, stimulants, and selected drugs subject to doping controls among elite sport students using analytical chemistry     

Thevis M  Sauer M  Geyer H  Sigmund G  Mareck U  Schänzer W 《Journal of sports sciences》2008,26(10):1059-1065

Drug abuse by adolescents has been investigated in various surveys that reported correlations between age, gender, and activity. However, none of these studies included chemical analyses to help substantiate the statements of participants. In the present study, the urine specimens of 964 students (439 females, 525 males; mean age 22.1 years, s = 1.7), who applied to study sports sciences at university, were assessed for anabolic steroids, stimulants, and selected drugs prohibited in sports. In total, 11.2% of the urine specimens provided contained drugs covered by doping controls. The most frequently detected compound was the major metabolite of tetrahydrocannabinol (9.8%) followed by various stimulants related to amphetamine and cocaine (1.0%). Indications of anabolic steroid use were found in 0.4% of urine samples but originated from contraceptives containing norethisterone. The present study provided unambiguous data on the status quo of drug (ab)use by adolescents hoping for a career related to elite sport or sports sciences. No use of anabolic steroids was detected. However, evidence for stimulants and tetrahydrocannabinol administration was obtained, although not reported by any participant, which highlights the issue of under-reporting in surveys based solely on questionnaires.  相似文献   

Exploring the Relationship Between Athletes’ Perceptions of the Motivational Climate to Their Compassion,Self-Compassion,Shame, and Pride in Adult Recreational Sport     

Mario S. Fontana  Mary D. Fry  Emily Cramer 《Measurement in physical education and exercise science》2017,21(2):101-111

The purpose of this study was to examine the relationships between athletes’ perceptions of the motivational climate (caring, task-, and ego-involving) to their levels of compassion, self-compassion, pride, and shame in a recreational sport setting. Athletes (N = 164) in a competitive Wiffle Ball tournament completed a survey. A canonical correlation analysis revealed one significant function indicating that athletes’ perceptions of a caring and task-involving motivational climate were associated with higher levels of authentic pride and lower levels of hubristic pride. Results suggest adult recreational sport participants may benefit from experiencing a positive and supportive team climate.  相似文献   

Community cartography in health communication: An asset-based mapping approach in four communities in rural Ecuador     

Benjamin R. Bates  Diana L. Marvel  Claudia Nieto-Sanchez  Mario J. Grijalva 《Journal of International and Intercultural Communication》2019,12(3):228-247

Scholars and practitioners are increasingly turning to maps as tools for promoting health and development communication. These maps are often criticized for privileging the interests of the global North and for authorizing (neo)colonial approaches. The authors offer a case of community mapping incorporating asset-based community development that offers an alternative cartography. Drawing on the maps produced by members of four communities in rural Ecuador, the authors articulate how their maps productively use and challenge assumptions about maps. Following this analysis, the authors offer some implications that community-scale maps have for articulating rhetorical alternatives in health and development communication.  相似文献   

Insights into Masolino's wall paintings in Castiglione Olona: Advanced reflectance and fluorescence imaging analysis     

Daniela Comelli  Austin Nevin  Gianluca Valentini  Iacopo Osticioli  Emilio Mario Castellucci  Lucia Toniolo  Davide Gulotta  Rinaldo Cubeddu   《Journal of Cultural Heritage》2011,12(1):11-18

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What is the future of electrical impedance spectroscopy in flow cytometry?     

Furkan Gke  Paolo S. Ravaynia  Mario M. Modena  Andreas Hierlemann 《Biomicrofluidics》2021,15(6)

More than 20 years ago, electrical impedance spectroscopy (EIS) was proposed as a potential characterization method for flow cytometry. As the setup is comparably simple and the method is label-free, EIS has attracted considerable interest from the research community as a potential alternative to standard optical methods, such as fluorescence-activated cell sorting (FACS). However, until today, FACS remains by and large the laboratory standard with highly developed capabilities and broad use in research and clinical settings. Nevertheless, can EIS still provide a complement or alternative to FACS in specific applications? In this Perspective, we will give an overview of the current state of the art of EIS in terms of technologies and capabilities. We will then describe recent advances in EIS-based flow cytometry, compare the performance to that of FACS methods, and discuss potential prospects of EIS in flow cytometry.  相似文献   

Electrical power free, low dead volume, pressure-driven pumping for microfluidic applications     

Moscovici M  Chien WY  Abdelgawad M  Sun Y 《Biomicrofluidics》2010,4(4):46501

This paper presents a simple-to-construct, low dead volume pump capable of generating a wide range of positive and negative pressures for microfluidic applications. The pump generates pressure or vacuum by changing the volume of air confined inside a syringe and is able to generate pressures between -95 and +300 kPa with a resolution as high as 1 Pa. Different from syringe pumps and electrokinetic pumping, which are capable of controlling flow rates only, our pump can be used to generate constant flow rates or constant pressures, which are required for certain applications such as the aspiration of biological cells for biophysical characterization. Compared to syringe pumps, the new pump has almost zero dead volume and does not exhibit pulsatile flows. Additionally, the system does not require electrical power and is cost effective (～$100). To demonstrate the capabilities of the pump, we used it to aspirate osteoblasts (MC3T3-E1 cells) and to determine Young's modulus of the cells, to generate a concentration gradient, and to produce variable-sized droplets in microchannels using hydrodynamic focusing.  相似文献