Precision of 1-RM prediction equations in non-competitive subjects performing strength training

The purpose of this study was to assess the precision of the 1-RM prediction equations proposed by Adams (1994), Baechle and Groves (2000), Brzycki (1993), Epley (1985), Lander (1985) and O’Conner et al. (1989) for strength assessment in fitness programs. Thirty one healthy regular strength training male practitioners (mean ± SD: 21.8 ± 4.0 years of age; 75.9 ± 8.4 kg of weight; and 178.1 ± 6.4 cm of height) performed two tests on the bench press exercise: (a) maximum test - determination of the 1-RM load; and (b) submaximum test - determination of the load matching 4 to 10 maximum repetitions. Analysis of variance (ANOVA) found no significant difference (p > .05) between maximum load determination through prediction equations or through the 1-RM test. The coefficient of determination (r2) varied from .94 to .96. The prediction equations had small standard error of estimate (2.7 to 3.2 kg). Results indicate that the 1-RM prediction equations could be used to determine the maximum load at the bench press exercise in subjects with low strength training experience

Analysis of the effect of different intensities and rest interval on the perceived exertion of athletes

The research examined the effects of different intensities and different rest intervals of strength training on the rating of perceived exertion (RPE) in young athletes. Participated in the study 23 young men, aged 17.06 ± .73 years, 68.01 ± 8.09 kg of body mass, and 173.65 �� 5.61 cm of height. They were submitted to the appropriateness of charges (5 RM, 10 RM or 15 RM) and rest intervals (30, 60 or 120 s) and then asked to point perceived exertion according to the OMNI-RES scale. A two-way ANOVA was used and significant differences were analyzed by post-hoc Bonferroni. For RPE there were no significant differences between the intensities in the recovery intervals evaluated. For intervals with the same intensity, there were differences between 15 RM and range of 120 and 60 s with 15 RM and 30 s intervals. Intensities of 10 and 5 RM, in the range of 120 s showed significant differences. It follows that the smaller the rest interval the greater the levels of fatigue regardless of the number of repetitions performed in all intensities and it may be inferred that the RPE was sensitive to reduction in the rest interval

Autopercepção da imagem corporal em estudantes do curso de educação física Self-perception of body image in the physical education course students

O objetivo do estudo foi analisar a autopercepção da imagem corporal (IC) e associar a IC com indicadores sociodemográficos, estado nutricional e nível de atividade física de universitários. Realizou-se um estudo transversal com 294 universitários (136 homens e 158 mulheres), mensurou-se a percepção da IC por meio da escala de silhueta, indicando a silhueta atual (SA), silhueta ideal (SI) e a silhueta ideal do sexo oposto (SIO). Ainda foram coletadas variáveis demográficas (sexo, idade, turno de estudo, ocupação), nível socioeconõmico, estado nutricional (índice de massa corporal) e o nível de atividade física (IPAQ - versão curta). Utilizou-se a análise descritiva e o teste de associação do qui-quadrado para análise dos dados. A prevalência de insatisfação com a IC foi de 61,2% (n = 180), sendo 61% nos homens e 61,4% nas mulheres. A silhueta 2 foi apontada por 57% das mulheres como a SI, entre os homens 38,2% e 39,7% apontaram a silhueta 3 e 4 como a SI. Foi identificada como SIO à silhueta 3 (63,2% masculino e 56,3% feminino). As mulheres demonstraram uma maior percepção (67,6%) em possuir uma silhueta menor que a atual. Já entre os homens houve a tendência (66,7%) a desejarem uma silhueta maior do que a atual. Além do sexo a percepção com a IC foi associada com o estado nutricional (p < 0,05), onde se observou que 78,7% dos indivíduos com excesso de peso desejam ter uma silhueta menor do que a atual. Concluísse que a autopercepção da IC esteve associada ao sexo e ao estado nutricional nos universitários<br>This study aimed at evaluating the self-perception of the body image (BI) and associating the BI to socio-demographic indicators, nutritional state and level of physical activities in university students. A cross-sectional study with 394 students was made (136 men and 158 women). The BI perception was measured by means of the silhouette scale, indicating the present silhouette (PS), the ideal silhouette (IS), and the ideal silhouette of the opposed gender (ISO). Demographic variables were also collected (gender, age, part of the day in which they study, occupation), socio-economical level, nutritional state (body mass index) and the level of physical activity (IPAQ - Short version). The descriptive analysis and the qui-square association test were used to analyze the data. The dissatisfaction prevalence with the BI was of 61.2% (n = 180), being 61% men and 61.4% women. The silhouette 2 was pointed by 57% and 38.2% of women and men as the IS, respectively. Silhouettes 3 and 4 were pointed as the IS by 38.2% of the women and 39.7% of the men. Silhouette 3 was identified as the ISO (63.2% male and 56.3% female). Women showed a higher prevalence (67.6%) of having a smaller silhouette than the present one. Men showed a tendency (66.7%) to prefer a bigger silhouette than the present one. Besides the gender, the BI perception was associated with the nutritional state (p < 0.05), in which it was observed that 78.7% of the overweight subjects to have a smaller silhouette than they have at present. The conclusion is that the BI self-perception was associated with gender and nutritional state of the university student

Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

International audienceThe shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis are widely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwide have devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparation of a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to more of the world's known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plants occurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past 12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on the algal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project that used cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals. This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plants found in one of the world's most biodiverse countries. We further identify collection gaps and summarize future goals that extend beyond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic to the country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plant groups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still unequally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the country. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades, the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, and plants from Brazil. This project also made all the information freely available online, providing a firm foundation for future research and for the management, conservation, and sustainable use of the Brazilian funga and flora