Antioxidant diet supplementation enhances aerobic performance in amateur sportsmen

The effects of antioxidant diet supplements on blood lactate concentration and on the aerobic and anaerobic thresholds and their adaptations to training were analysed. Fifteen amateur male athletes were randomly assigned to either a placebo group or an antioxidant-supplemented group (90 days supplementation with 500 mg x day(-1) of vitamin E and 30 mg x day(-1) of beta-carotene, and the last 15 days also with 1 g x day(-1) of vitamin C). Before and after the antioxidant supplements, the sportsmen performed a maximal exercise test on a cycle ergometer and maximal and submaximal physiological parameters were assessed together with blood lactate concentration. Maximal oxygen uptake (VO(2max)), maximal blood lactate concentration, and the maximal workload attained rose significantly in both groups after the 3 months of training. At the end of the study, maximal blood lactate concentration was lower in the group that took supplements than in the placebo group. The percentage of VO(2max) attained at the anaerobic threshold rose significantly in both groups after 3 months of training, although the final value in the supplemented group was higher than that in the placebo group. Antioxidant diet supplements induced lower increases in blood lactate concentration after a maximal exercise test and could improve the efficiency in which aerobic energy is obtained.     

A typology of students in intermediate vocational education and training programmes based on student engagement factors,sociodemographic characteristics and intentions of dropping out

The main objective of this article is to define a typology of students enrolled in intermediate vocational education and training programmes in Spain. Students were first placed in groups based on various factors related to engagement. Then, their sociodemographic characteristics were analysed. Finally, the intentions of dropping out were considered in each of the groups. The results obtained describe a typology of students consisting of five groups with different levels of engagement. Each of the groups is associated with distinct sociodemographic characteristics and shows notable differences with regards to intentions of leaving their studies. The results of this research can serve to detect and prevent drop‐outs that take place at this level by identifying at‐risk profiles and creating more adequate approaches and interventions.     

Age-related differences in repeated-sprint ability in highly trained youth football players

Abstract

In this study, we investigated the age-related differences in repeated-sprint ability and blood lactate responses in 134 youth football players. Players from the development programme of a professional club were grouped according to their respective under-age team (U-11 to U-18). Following familiarization, the participants performed a repeated-sprint ability test [6 × 30-m sprints 30 s apart, with active recovery (2.0–2.2 m · s^?1) between sprints]. The test variables were total time, percent sprint decrement, and post-test peak lactate concentration. Total time improved from the U-11 to U-15 age groups (range 33.15 ± 1.84 vs. 27.25 ± 0.82 s), whereas no further significant improvements were evident from U-15 to U-18. No significant differences in percent sprint decrement were reported among groups (range 4.0 ± 1.0% to 5.5 ± 2.1%). Post-test peak lactate increased from one age group to the next (range 7.3 ± 1.8 to 12.6 ± 1.6 mmol · l^?1), but remained constant when adjusted for age-related difference in body mass. Peak lactate concentration was moderately correlated with sprint time (r = 0.70, P > 0.001). Our results suggest that performance in repeated-sprint ability improves during maturation of highly trained youth football players, although a plateau occurs from 15 years of age. In contrast to expectations based on previous suggestions, percent sprint decrement during repeated sprints did not deteriorate with age.     

Analysing the possible impact of landslides and avalanches on cultural heritage in Upper Svaneti,Georgia

In this paper, the threat posed to cultural heritage by landslides and avalanches is analysed for two communities (Ushguli and Mulakhi) in the Upper Svaneti region in Georgia. The vulnerability of 60 cultural heritage objects has been evaluated through a conservation calculation based on an existing methodology using a State of Conservation Index (SCIx), which served as an input in a Spatial Multicriteria Evaluation (SMCE). Factors that are considered important for the occurrence of landslides (slope, landcover, lithology and drainage density) and snow avalanches (slope, insolation, slope curvature and landcover) have been used to generate a susceptibility map. A qualitative risk assessment was carried out by combining susceptible areas and cultural heritage objects. As there were very limited historical data available on the occurrence of landslides and snow avalanches, a combination of local and expert knowledge has been used to extract information on both cultural heritage and natural hazards. Existing management plans were also analysed to evaluate how natural hazards could be incorporated. Finally, some recommendations are given related to the analysis of the impact of natural hazards on cultural heritage in Georgia.     

Inclusive education and social inequality: an update of the question and some geographical considerations

The aim of this article is to review the current state of inclusive education in the world and to suggest a few relevant considerations. The first section “Two parallel concerns” retraces the inescapable connections between the educational aspects of inclusive education and more general concerns regarding inequality. The second section “Inclusive education in academic publications” scrutinizes academic publications and identifies two major themes among their contents: at first sight the internal transformations occurring in schools attract attention, but subsequently the territorial environment also gives rise to some concern. The third section “Inclusive education in the publications of international organizations” notes our search criteria for sifting through the documentation of the World Bank, OECD and UNESCO. The IBE/UNESCO workshops reflect varied, though converging interpretations of the concept of inclusive education in different parts of the world. All the official publications, however, tend to concentrate on the internal dynamics of schools, and there are not many that take a look at relations between inclusive education and public policy. Our last section “The geographical dimension of inclusive education” puts forward a few arguments in favour of paying more attention to inclusive education at the local and national levels. The main reasons for highlighting the local dimension arise from the combined factors of social deprivation, the need to co-ordinate measures taken in schools and the possibility of allowing a significant opening for community participation. The main reasons for paying attention to the national dimension relate to possible synergies between inclusive education and the expansion of education (for example, is schooling progressing at the same pace at different educational levels?), as well as between inclusive education and social protection (for example, do the many educational conditions applied to cash transfers have consistent pedagogic implications?).     

Measuring educational liberalisation. A global analysis of GATS

In this article, we examine the process of trade liberalisation of educational services in the framework of the General Agreement on Trade in Services (GATS) of the World Trade Organisation (WTO). Specifically, we analyse the factors that influence the undertaking of commitments on educational liberalisation by the member countries of the WTO. The text is divided into three parts. In the first, we examine in detail the methodology of GATS negotiation. Second, in order to measure the degree of liberalisation of educational services in the countries we construct an index called EduGATS. Finally, we review and analyse the commitments on liberalisation consolidated by member countries in terms of educational services. The sources of the primary data are the lists of commitments on services of the members of the WTO, interviews with delegations from member countries, documents on the position of various delegations and documents from the WTO Council for Trade in Services.