cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.8227202.v1
title: Effect of number of hours and days of accelerometer use on physical activity estimates in adolescents

description: Abstract The study analyzed the effect of number of hours and days of accelerometer use on estimates of physical activity (PA) time in adolescents. Cross-sectional study of 784 adolescents from 10 to 14 years old (53.9% girls). Overlapping 95% confidence intervals (95%CI) were used to compare mean light (LPA), moderate (MPA), vigorous (VPA) and moderate to vigorous (MVPA) physical activity times and prevalence of sufficient PA levels between different numbers of hours (≥6, ≥8 and ≥10 hours/day) and days (≥3, ≥4, ≥5 and 7 days of use). The criterions of ≥6 hours/day with ≥3, ≥4, ≥5 e 7 days and ≥8 hour/day with ≥3, ≥4 e ≥5 days of accelerometer use underestimated, in average, the LPA time in 23.1 and 12.6 min/day, respectively, compared ≥10 hours/day. There were no significant differences in mean MPA, VPA and MVPA times and prevalence of sufficient PA levels between the number of hours and days of use analyzed. To produce accurate estimates of PA time in teenagers, ≥3 days of accelerometer use was adopted for ≥10 hours/day of LPA and ≥ 6 hours/day of MPA, VPA and MVPA.
DOI: 10.6084/m9.figshare.8227199
title: Validity and Reliability of the Portuguese school physical activity environment questionnaire in adolescents

description: Abstract The aim of this study is to analyze the psychometric properties and to examine the factorial validity of the Portuguese version of the Questionnaire Assessing School Physical Activity Environment (Q-SPACE) for school-age youth. The translated and adapted version of the questionnaire was applied and resulted in two studies: study I, in which 504 students participated (56% boys), the factorial structure of the scale was examined; in study II, which involved 501 students (53.5% boys), the factorial structure obtained in study I was tested through confirmatory factor analysis. The results of the exploratory factorial analysis, carried out in study I, showed that the Portuguese version of the Q-SPACE is composed of five factors that characterize the students’ perception regarding the social and physical school environment for physical activity: equipment and space conditions; recess; school social support; physical education structure; school activity offer. Internal consistency values ranged from 0.60 to 0.89. The confirmatory factor analysis confirmed the applicability of the Portuguese Q-SPACE version, presenting adequate fit indexes: χ2/df = 2.90, GFI = 0.92; CFI = 0.92; RMSEA = 0.06. In conclusion, Q-SPACE showed acceptable validity and reliability for assessing school physical activity environment in Portuguese adolescents.
DOI: 10.6084/m9.figshare.8227193
title: The structuring role of macrophytes on plankton community composition and bacterial metabolism in a large subtropical shallow lake

description: Abstract Aim We aimed at investigating changes in major groups of plankton (bacterioplankton, phytoplankton and zooplankton) and bacterioplankton metabolism along a transect covering a littoral, macrophyte dominated zone to a pelagic, phytoplankton dominated zone in the large subtropical shallow lake Mangueira, Rio Grande do Sul State, Brazil. Methods The 3.2 km littoral-pelagic transect (7 points) was sampled in October 2007 in the southern section of the lake. Major taxonomic groups of phytoplankton and zooplankton were counted and identified by optic microscopy. The bacterioplankton was identified by FISH (Fluorescent in situ Hybridization), and bacterial abundance, biovolume and biomass were quantified by epifluorescence microscopy. Primary and bacterial productions were measured by incorporation of radioactive bicarbonate and leucine, respectively. Bacterial respiration was measured by experiments of oxygen consumption, and an extensive data set of limnological variables were measured through standard methods. Results Sharp changes in chemical/physical variables, as well as in bacterial density, biovolume, biomass and bacterial growth efficiency occurred on average at 30% of macrophyte coverage, with most of them increasing towards pelagic zones. The composition of major groups of zooplankton, phytoplankton, bacterial morphotypes and phylotypes indicated that different planktonic assemblies live apart in these two zones. Conclusions Our results demonstrate that macrophytes are a structuring driver of the plankton community and bacterial metabolism in this large subtropical shallow lake.
DOI: 10.6084/m9.figshare.8227196
title: Prevalence and factors associated with body image dissatisfaction among university students: repeated surveys analysis

description: Abstract Body image dissatisfaction may favor the onset of disorders such as anorexia and bulimia. The aim of this study was to compare the prevalence of body image dissatisfaction between two surveys and to assess sociodemographic factors and link with university associated with body image dissatisfaction due to overweight and thinness. Two cross-sectional studies were carried out with samples of 1,085 and 1,041 public higher education institution students in years 2012 and 2014, respectively. The body silhouette scales measured body image dissatisfaction due to overweight and thinness. Sociodemographic variables (sex, age and marital status) and link with the university (study shift, university time and study areas) were the independent variables. Comparisons between surveys were performed using the Chi-square test and the association between variables by Odds Ratio (OR). There was an increase in the prevalence of body image dissatisfaction in students of the Engineering area between surveys. In 2012, younger presented lower chances of dissatisfaction due to overweight and the males higher chances of dissatisfaction due to thinness (OR: 2.06; 95%CI: 1.50–2.84). In 2014, males, younger, without partner, enrolled in the 2nd year of university and of the Health Sciences area (OR: 0.49; CI95%: 0.25–0.97) presented lowers chances of presenting dissatisfaction due to overweight. The prevalence of body image dissatisfaction due to overweight between surveys is higher in men and was associated with lower chances of dissatisfaction due to overweight in both surveys and in younger students.
DOI: 10.6084/m9.figshare.8227190
title: Comparison of Gap Filling Methodologies for Meteorological Data in Southern Brazil Stations

description: Abstract The network of weather stations in Brazil is very recent, with few stations in the country possessing data over more than 100 years. In addition, many of the series from these stations present missing data, either due to lack of measurement (in the case of conventional stations) or due to equipment failures (in the case of automatic stations). There are different methods in the literature for filling these gaps. In this work, six methods are compared and applied to series of known monthly data for mean compensated temperature and precipitation for weather stations located in the State of Rio Grande do Sul, in Southern Brazil. The results for mean compensated temperature suggest that multiple linear regression methods and regional weighing are best suited for estimating missing data, while for precipitation there was no superior method.
DOI: 10.6084/m9.figshare.8227193.v1
title: The structuring role of macrophytes on plankton community composition and bacterial metabolism in a large subtropical shallow lake

description: Abstract Aim We aimed at investigating changes in major groups of plankton (bacterioplankton, phytoplankton and zooplankton) and bacterioplankton metabolism along a transect covering a littoral, macrophyte dominated zone to a pelagic, phytoplankton dominated zone in the large subtropical shallow lake Mangueira, Rio Grande do Sul State, Brazil. Methods The 3.2 km littoral-pelagic transect (7 points) was sampled in October 2007 in the southern section of the lake. Major taxonomic groups of phytoplankton and zooplankton were counted and identified by optic microscopy. The bacterioplankton was identified by FISH (Fluorescent in situ Hybridization), and bacterial abundance, biovolume and biomass were quantified by epifluorescence microscopy. Primary and bacterial productions were measured by incorporation of radioactive bicarbonate and leucine, respectively. Bacterial respiration was measured by experiments of oxygen consumption, and an extensive data set of limnological variables were measured through standard methods. Results Sharp changes in chemical/physical variables, as well as in bacterial density, biovolume, biomass and bacterial growth efficiency occurred on average at 30% of macrophyte coverage, with most of them increasing towards pelagic zones. The composition of major groups of zooplankton, phytoplankton, bacterial morphotypes and phylotypes indicated that different planktonic assemblies live apart in these two zones. Conclusions Our results demonstrate that macrophytes are a structuring driver of the plankton community and bacterial metabolism in this large subtropical shallow lake.
DOI: 10.6084/m9.figshare.8227196.v1
title: Prevalence and factors associated with body image dissatisfaction among university students: repeated surveys analysis

description: Abstract Body image dissatisfaction may favor the onset of disorders such as anorexia and bulimia. The aim of this study was to compare the prevalence of body image dissatisfaction between two surveys and to assess sociodemographic factors and link with university associated with body image dissatisfaction due to overweight and thinness. Two cross-sectional studies were carried out with samples of 1,085 and 1,041 public higher education institution students in years 2012 and 2014, respectively. The body silhouette scales measured body image dissatisfaction due to overweight and thinness. Sociodemographic variables (sex, age and marital status) and link with the university (study shift, university time and study areas) were the independent variables. Comparisons between surveys were performed using the Chi-square test and the association between variables by Odds Ratio (OR). There was an increase in the prevalence of body image dissatisfaction in students of the Engineering area between surveys. In 2012, younger presented lower chances of dissatisfaction due to overweight and the males higher chances of dissatisfaction due to thinness (OR: 2.06; 95%CI: 1.50–2.84). In 2014, males, younger, without partner, enrolled in the 2nd year of university and of the Health Sciences area (OR: 0.49; CI95%: 0.25–0.97) presented lowers chances of presenting dissatisfaction due to overweight. The prevalence of body image dissatisfaction due to overweight between surveys is higher in men and was associated with lower chances of dissatisfaction due to overweight in both surveys and in younger students.
DOI: 10.6084/m9.figshare.8227199.v1
title: Validity and Reliability of the Portuguese school physical activity environment questionnaire in adolescents

description: Abstract The aim of this study is to analyze the psychometric properties and to examine the factorial validity of the Portuguese version of the Questionnaire Assessing School Physical Activity Environment (Q-SPACE) for school-age youth. The translated and adapted version of the questionnaire was applied and resulted in two studies: study I, in which 504 students participated (56% boys), the factorial structure of the scale was examined; in study II, which involved 501 students (53.5% boys), the factorial structure obtained in study I was tested through confirmatory factor analysis. The results of the exploratory factorial analysis, carried out in study I, showed that the Portuguese version of the Q-SPACE is composed of five factors that characterize the students’ perception regarding the social and physical school environment for physical activity: equipment and space conditions; recess; school social support; physical education structure; school activity offer. Internal consistency values ranged from 0.60 to 0.89. The confirmatory factor analysis confirmed the applicability of the Portuguese Q-SPACE version, presenting adequate fit indexes: χ2/df = 2.90, GFI = 0.92; CFI = 0.92; RMSEA = 0.06. In conclusion, Q-SPACE showed acceptable validity and reliability for assessing school physical activity environment in Portuguese adolescents.
DOI: 10.6084/m9.figshare.8227184
title: Hemodynamic responses to strength exercise with blood flow restriction in small muscle groups

description: Abstract The aim of this study was to analyze the acute hemodynamic responses to strength exercise with blood flow restriction involving small muscle groups. The sample consisted of 10 male volunteers (22.6 ± 2.07 years, 1.78 ± 0.06 m, 76.32 ± 13.36 kg) who randomly performed two experimental protocols involving the elbow flexion exercise with the dominant arm: strength exercise of the elbow flexors with blood flow restriction (EFBFR) and strength exercise of the elbow flexors without blood flow restriction (EEF). A cross-over design with a seven to ten days interval between the experimental protocols was used. Systolic blood pressure (SBP), diastolic (DBP) and mean (MAP), pulse pressure (PP), heart rate (HR) and double product (DP) were evaluated at rest, immediately after exercise and at 15 minutes of recovery. SBP, DBP and MAP presented a significant increase (p &lt;0.05) immediately after EFBFR when compared to the protocol without blood flow restriction, returning to rest values at the 15 minutes of recovery. DBP significantly reduced (p &lt;0.05) in the recovery period only in the EFBFR experiment and HR increased post-effort in both experiments. The PP and DP did not change between the different times, regardless of the protocol.The results of the present study allow us to conclude that strength exercise with BFR involving small muscle groups was more efficient than exercise without BFR to promote acute changes in hemodynamic responses and that BFR did not represent a cardiovascular risk considering its effects on PP.
DOI: 10.6084/m9.figshare.8227187
title: Modes of commuting to school among 5th and 6th grade schoolchildren

description: Abstract Active commuting (walking/cycling) is seen as a strategy to promote active behaviors in children’s daily school life. This study aimed to analyze the modes of commuting and perceptions of children in relation to the possibility of active commuting to school according to sex. Overall, 101 students (M=11.39/SD=1.22) enrolled in the 5th and 6th grades from two public elementary schools in the state of Maranhão, Brazil, participated in this study. Data were collected through a questionnaire administered to students. The results showed that 21.8% of respondents had active commuting (19.8% on foot / 2% bicycle), without statistically significant differences; however, boys were more predisposed to walking and cycling in relation to girls. As positive justifications, respondents evidenced the ‘home-school proximity’ and ‘fun/pleasure’ provided during the journey, and ‘distance’ and ‘traffic / insecurity’ as barriers to the possibility of walking or cycling to school.
DOI: 10.6084/m9.figshare.8227190.v1
title: Comparison of Gap Filling Methodologies for Meteorological Data in Southern Brazil Stations

description: Abstract The network of weather stations in Brazil is very recent, with few stations in the country possessing data over more than 100 years. In addition, many of the series from these stations present missing data, either due to lack of measurement (in the case of conventional stations) or due to equipment failures (in the case of automatic stations). There are different methods in the literature for filling these gaps. In this work, six methods are compared and applied to series of known monthly data for mean compensated temperature and precipitation for weather stations located in the State of Rio Grande do Sul, in Southern Brazil. The results for mean compensated temperature suggest that multiple linear regression methods and regional weighing are best suited for estimating missing data, while for precipitation there was no superior method.
DOI: 10.6084/m9.figshare.8227181
title: Evaluation of the Hydrometeorological Parameters on Sorocaba River Watershed - SP

description: Abstract Understanding the water cycle assists in the planning process of water resources, in projects of hydraulic works and environmental studies. This work was performed the evaluation of hydrometeorological parameters and the quantification of water flow in each of the major phases of the hydrological cycle, allowing the proposal of a circulation model of the water on Sorocaba river watershed-SP. The parameters were estimated by water balance equation, the historical datas of rainfall, temperature and flow of hydrometeorological network and information in the process of use concession of the water resources. Considering that the average annual flow in the river mouth more flow of consumed water corresponds to the sheet surplus, the difference between results estimated and observed was less than 10%. The average annual flow in the watershed more consumed flow was 63.9 m3 s-1, which corresponds to 25% of the average annual rainfall volume. Estimated water surplus was 56.5 m3 s-1, ETP 1,011 mm year-1 and ETR 999 mm year-1. This information contributes to planning the use of water resources in the watershed.
DOI: 10.6084/m9.figshare.8227181.v1
title: Evaluation of the Hydrometeorological Parameters on Sorocaba River Watershed - SP

description: Abstract Understanding the water cycle assists in the planning process of water resources, in projects of hydraulic works and environmental studies. This work was performed the evaluation of hydrometeorological parameters and the quantification of water flow in each of the major phases of the hydrological cycle, allowing the proposal of a circulation model of the water on Sorocaba river watershed-SP. The parameters were estimated by water balance equation, the historical datas of rainfall, temperature and flow of hydrometeorological network and information in the process of use concession of the water resources. Considering that the average annual flow in the river mouth more flow of consumed water corresponds to the sheet surplus, the difference between results estimated and observed was less than 10%. The average annual flow in the watershed more consumed flow was 63.9 m3 s-1, which corresponds to 25% of the average annual rainfall volume. Estimated water surplus was 56.5 m3 s-1, ETP 1,011 mm year-1 and ETR 999 mm year-1. This information contributes to planning the use of water resources in the watershed.
DOI: 10.6084/m9.figshare.8227184.v1
title: Hemodynamic responses to strength exercise with blood flow restriction in small muscle groups

description: Abstract The aim of this study was to analyze the acute hemodynamic responses to strength exercise with blood flow restriction involving small muscle groups. The sample consisted of 10 male volunteers (22.6 ± 2.07 years, 1.78 ± 0.06 m, 76.32 ± 13.36 kg) who randomly performed two experimental protocols involving the elbow flexion exercise with the dominant arm: strength exercise of the elbow flexors with blood flow restriction (EFBFR) and strength exercise of the elbow flexors without blood flow restriction (EEF). A cross-over design with a seven to ten days interval between the experimental protocols was used. Systolic blood pressure (SBP), diastolic (DBP) and mean (MAP), pulse pressure (PP), heart rate (HR) and double product (DP) were evaluated at rest, immediately after exercise and at 15 minutes of recovery. SBP, DBP and MAP presented a significant increase (p &lt;0.05) immediately after EFBFR when compared to the protocol without blood flow restriction, returning to rest values at the 15 minutes of recovery. DBP significantly reduced (p &lt;0.05) in the recovery period only in the EFBFR experiment and HR increased post-effort in both experiments. The PP and DP did not change between the different times, regardless of the protocol.The results of the present study allow us to conclude that strength exercise with BFR involving small muscle groups was more efficient than exercise without BFR to promote acute changes in hemodynamic responses and that BFR did not represent a cardiovascular risk considering its effects on PP.
DOI: 10.6084/m9.figshare.8227175
title: Monitoring simplification in plankton communities using different ecological approaches

description: Abstract Aim This study aimed to answer: (i) can phytoplankton communities be used as surrogate of zooplankton communities?; (ii) can we use ecological approaches like functional groups (FG) or morphofunctional classification (MBFG) as surrogate for phytoplankton species?; (iii) can we use substitute groups (cladocera, copepod, rotifer or testate amoebae) as surrogate for zooplankton species?; (iv) are the environmental variables’ ordination standards concordant with the ordering patterns of phytoplankton and zooplankton species?; and (v) for both communities, is the spatial pattern of ordination maintained using density data or presence/absence of individuals or lower taxonomic resolutions? Methods The study was conducted in 25 water bodies that supply central-pivot irrigation in the Federal District - Brazil (Rio Preto Basin), in October 2012. We evaluated some physical and chemical variables as well as phytoplankton and zooplankton samples. To evaluate correlation among biological groups, numerical and higher taxonomic resolutions, we performed some Mantel and Procrustes analyses. Results Evaluating the use of substitute groups, comparisons between phytoplankton and zooplankton, FG and MBFG classifications and almost all the comparisons between zooplankton groups suggested concordant patterns. However, the values of r were low, all below 0.70. Biological analyses with phytoplankton and zooplankton can be performed using presence/absence of individuals without significant loss of information, except for MBFG classification and copepods. Data may also be used at genus or family level for copepods and testate amoebae and only data at genus level for cladocerans and rotifers. Different results were found concerning taxonomic resolution for phytoplankton considering that, while being significant, the r value was less than 0.70. Conclusions For environmental monitoring purposes, it is important to sample both phytoplankton and zooplankton communities because one is not surrogate of the other one, in the same way as phytoplankton density and their functional and morphofunctional approaches. On the other hand, to simplify the environmental monitoring, it is possible to adopt presence/absence species data instead of abundance data for both zooplankton and phytoplankton communities, except for copepods and morphofunctional approach. It is also possible to adopt genera level for zooplankton community and family level for copepods and testate amoebae.
DOI: 10.6084/m9.figshare.8227187.v1
title: Modes of commuting to school among 5th and 6th grade schoolchildren

description: Abstract Active commuting (walking/cycling) is seen as a strategy to promote active behaviors in children’s daily school life. This study aimed to analyze the modes of commuting and perceptions of children in relation to the possibility of active commuting to school according to sex. Overall, 101 students (M=11.39/SD=1.22) enrolled in the 5th and 6th grades from two public elementary schools in the state of Maranhão, Brazil, participated in this study. Data were collected through a questionnaire administered to students. The results showed that 21.8% of respondents had active commuting (19.8% on foot / 2% bicycle), without statistically significant differences; however, boys were more predisposed to walking and cycling in relation to girls. As positive justifications, respondents evidenced the ‘home-school proximity’ and ‘fun/pleasure’ provided during the journey, and ‘distance’ and ‘traffic / insecurity’ as barriers to the possibility of walking or cycling to school.