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EFFECT OF A SPORT DRINK WITH ELECTROLYTE AND ISOMALTULOSE ON TIME TO EXHAUSTION AT AN INTENSITY ABOVE ANEROBIC THRESHOLD
No full textSports
drinks are formulated to provide fluid, facilitating drinking, essential electrolytes and carbohydrate replacement for an optimal thermoregulation
and to maximize exercise performance. Isomaltulose, for its slow rate of hydrolysis and low glycaemic index (Lina et al.,
2002), and for the characteristics of fructose, its component, with increased fluid and solute absorption in the small intestine and increased
exogenous oxidation (Johnson and Murray, 2010), could improve the duration of exercise. The aim of this study was to test, with
a trial to exhaustion, one commercial sport drink with these elements. Methods Twenty young subjects performed, not knowing the aim
of the test and not seeing the clock, two separate trials at exhaustion on a cycle ergometer, at a fixed power 10% higher than their Lactate
Threshold, during which they could drink ad libitum, in a random order, plain water or a commercial sport beverage (H3OPro©), with
electrolytes, isomaltulose, vitamins B and C. Heart rate, blood lactate, time to exhaustion and drunk fluid were measured at the end of
the trial. Paired Student-t test were performed. Results When subjects could drink H3OPro© they drunk more (505 vs 361ml; p=0.031),
cycled longer (40’24’ vs 32’57’; p=0.005) and reached a lower blood lactate (4.9 vs 5.5mM) than with plain water. Discussion A beverage,
like the one tested, that helps drinking more fluid can maintain euhydration and, therefore, optimal thermoregulation. A moderate and
balanced concentration in the ingested fluid of essential electrolytes enhances both water absorption and retention (Wendt et al. 2007). A
sound carbohydrate formulation provides useful fuel for muscles but, according to blood lactate values, and differently from other studies
(Achten et al., 2007), fat oxidation seemed to be higher and carbohydrate oxidation lower with H3OPro© than with water. This could be
probably due to the presence of isomaltulose that, as previously showed (West et al. 2011; Achten et al. 2007), can lower carbohydrate
and enhance lipid oxidation rates during the later stages of exercise. Consuming a well balanced sport beverage can significantly improve
duration of exercise in cyclin
Stretching e vibrazioni, due metodiche per l’allenamento a confronto. Pro e contro riportati dalla letteratura scientifica
No full textTraduzione della Convenzione relativa alle garanzie internazionali su beni mobili strumentali
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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