cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.5668285.v1
title: Intensity-dependent effects of cycling exercise on corticospinal excitability in healthy humans: a pilot study

description: Abstract Aims the aim of this study was to verify the effects of different intensities of locomotor exercise on corticospinal excitability. Methods 18 healthy subjects (27.6 ± 6.5 years,) participated in a design study of three different exercise protocols on a cycle ergometer: (i) 10 min at 75% Wmax (high intensity); (ii) 15min at 60% Wmax (moderate intensity) or (iii) 30 min at 45% Wmax (low intensity). The protocols of lower body cycling were assigned in random order in separate sessions. A control session was done with subjects at rest. Corticospinal excitability was assessed before (baseline) and every 5 min for 15min after the end of exercise/rest (time: 0, 5, 10 and 15) by measurement of the motor evoked potential (MEP) elicited by transcranial magnetic stimulation in the relaxed first-dorsal interosseus muscle. Results Compared to the resting session, a significant decrease (64%) in the motor evoked potential amplitudes was found only in the session of exercise of high intensity. This result seems depend on the level of physical activity of subject. No change was found after rest, low and moderate exercises. Conclusions These findings suggest that changes in the corticospinal excitability depend on exercise intensity and level of physical activity of subjects.
DOI: 10.6084/m9.figshare.5862132.v1
title: Effects of the platelet-rich fibrin associated with physical exercise in a model of median nerve compression.

description: Abstract AIMS Platelet-Rich Fibrin (PRF) is a new and promising technique for tissue repair, however, there is still a gap about its action on peripheral nerve injury, as well as its association with physical exercise. Thus, the aim of this study was to evaluate the effects of the PRF associated with physical exercise in a model of median nerve compression. METHODS 42 rats, divided into: Control, non-injured limb, and other six groups with nerve lesion (Control lesion; Treated with PRF; Treadmill walking; Free swimming; PRF and treadmill; PRF and swimming). The lesion model was performed with median nerve compression. To obtain the PRF, 1.5 mL of blood was centrifuged and the fibrin clot positioned directly over the compression region. The exercise protocols were performed during 2 weeks. The evaluations performed were grip strength tests and histologic analysis. RESULTS both, grip strength and histomorphometric evaluations (fiber numbers and axon density) did not present significant differences between the treated and lesion groups, however, in the morphological evaluation it was possible to distinguish characteristics of the repair process for the treated groups. CONCLUSION a slight qualitative improvement was observed for the treated groups, especially when it was associated PRF with free swimming.
DOI: 10.6084/m9.figshare.5668861.v1
title: Estimate of Resting Energy Expenditure by DXA in Boys of Different Nutritional Statuses

description: Abstract Aim: to estimate the resting energy expenditure (REE) of organ tissue components using Dual Energy x-ray Absorptiometry (DXA) in pubertal boys. The mass of components and REE were compared among groups of different nutritional statuses. Methods: a sample of 278 boys (13.7 ± 2.4 years old) was grouped according to BMI nutritional status for Brazilian children and adolescents1 such as Underweight (UW), Normal weight (NW), Overweight (OW), and Obese (OB). The REE of organ tissue components given by DXA was calculated using specific models for skeletal muscle tissue (SMT), adipose tissue (AT), bone tissue (BT) and residual tissue (RT) based on previous reports. The absolute and relative REE (REEDXA) of each component were statistically compared among groups. Results: No differences of total REEDXA were found among nutritional groups (F(3, 274)=0.071, p=0.976). When, however, specific REE was considered per component, differences were found for BT and REEBT between NW-OW (p=0.003) and NW-OB (p=0.048); in AT and REEAT for all the groups (p&lt;0.001), except between UW-NW (p=1.000); in RT and REERT between NW-OB (p=0,022) and SMT and REESMT (p=0,039). Greater proportions of organ tissue of RT and high metabolic rates, were observed in the UW group (78.3%) in comparison to the OB group (60.7%). Conclusion: This approach provides a new opportunity to examine energy metabolism for individual differences of pediatric populations. It is an applicable strategy both to prescribe exercises and to administer diets to this population, as it reveals the magnitude of heat-producing body components.
DOI: 10.6084/m9.figshare.6318401
title: Socio-demographic factors influences on guardians’ perception of Developmental Coordination Disorder among Brazilian schoolchildren

description: Abstract AIM The objective of this study was to identify socio-demographic factors that are associated with the guardians’ perception of developmental coordination disorder among schoolchildren from seven to ten years old. METHODS The parents/guardians of 361 children completed the Developmental Coordination Disorder Questionnaire (DCDQ) and a socio-demographic questionnaire in this cross-sectional study. The univariate relationship between the DCDQ and socio-demographic factors was tested by the chi-square test. The odds ratio (OR) with 95% confidence interval was calculated. Socio-demographic variables with p≤0.20 were included in the logistic regression analysis. RESULTS The child's age (B = 0.40; OR = 1.49; p &lt;0.01) and the guardian undergoing treatment for illness (B = 0.97; OR = 2.65; p = 0.02) were retained in the final regression model. CONCLUSION Thus, increasing children’s’ age and guardians undergoing treatment for illness increased the guardians’perception of developmental coordination disorder.
DOI: 10.6084/m9.figshare.14290252
title: Parental education and perception of outdoor playing time for preschoolers

description: Abstract Aim: The objective of this study was to analyze whether or not socioeconomic positions influence outdoor playtime during the week (WK) and on the weekends (WEND). Methods: The sample consisted of 485 (girls; n=223) healthy preschoolers, aged from 3 to 6 years, enrolled in kindergartens from the metropolitan area of Porto, Portugal. Physical Activity (PA) was assessed for 7 consecutive days with an accelerometer. The time playing outdoors during the WK or the WEND was reported by parents. Anthropometric data (weight and height) was collected following standardized protocols. Socioeconomic position was assessed by Parental Education (PE), according to the Portuguese education system. Results: We found differences in time spent playing outdoors either for the WK or WEND, but not for Total PA (TPA), in both sexes. However, regression analysis showed that after age adjustment, BMI and TPA for both sexes, we only found significant associations between low PE (LPE) and high PE (HPE) groups on WK or WEND. However, we found no statistically significant association for boys on the WK (p=0.06). Conclusion: Our findings suggest that socioeconomic position can influence the children’s time spent in outdoor activities, especially on the weekends. This may have implications for future interventions with this age group.
DOI: 10.6084/m9.figshare.5668675.v1
title: A cross-cultural study of physical activity and sedentariness in youth from Mozambique and Portugal

description: Abstract Aim: The purpose of this study was to analyse the effects of age, sex, body mass index (BMI) and country of origin (Mozambique versus Portugal) on physical activity and sedentariness. Methods: Sample size was comprised of 593 adolescents from Mozambique (n=258) and Portugal (n=335), aged 10-15 years old. Height and weight were measured, and BMI was computed; furthermore, subjects were classified in two groups (normal weight and overweight/obese). The mean time (min/day) spent in moderate-to-vigorous physical activity (MVPA), light physical activity (LPA), and sedentary activity were assessed using the GT3X Actigraph accelerometer over at least 4 days (1 weekend day) with a minimum of 10 hours/day of monitoring. Multiple regression analysis was done in SPSS 20. Results: A low percentage of Mozambican (3.9%) and Portuguese (4.3%) youth complied with the MVPA recommendations (60min·day-1). However, Portuguese boys spend more time in MVPA. Girls and those with higher BMI spend more time in sedentary activities and less time in MVPA and LPA; older adolescents spend more time in sedentary activities and less time in LPA. There is a significant effect of the country of origin on MVPA, favouring Portuguese youth. Conclusions: Results suggest country differences in MVPA between Mozambican and Portuguese youth - the Mozambicans are less involved in MVPA than the Portuguese, probably reinforcing the undesirable effect of the urbanization process in developing nations.
DOI: 10.6084/m9.figshare.5668861
title: Estimate of Resting Energy Expenditure by DXA in Boys of Different Nutritional Statuses

description: Abstract Aim: to estimate the resting energy expenditure (REE) of organ tissue components using Dual Energy x-ray Absorptiometry (DXA) in pubertal boys. The mass of components and REE were compared among groups of different nutritional statuses. Methods: a sample of 278 boys (13.7 ± 2.4 years old) was grouped according to BMI nutritional status for Brazilian children and adolescents1 such as Underweight (UW), Normal weight (NW), Overweight (OW), and Obese (OB). The REE of organ tissue components given by DXA was calculated using specific models for skeletal muscle tissue (SMT), adipose tissue (AT), bone tissue (BT) and residual tissue (RT) based on previous reports. The absolute and relative REE (REEDXA) of each component were statistically compared among groups. Results: No differences of total REEDXA were found among nutritional groups (F(3, 274)=0.071, p=0.976). When, however, specific REE was considered per component, differences were found for BT and REEBT between NW-OW (p=0.003) and NW-OB (p=0.048); in AT and REEAT for all the groups (p&lt;0.001), except between UW-NW (p=1.000); in RT and REERT between NW-OB (p=0,022) and SMT and REESMT (p=0,039). Greater proportions of organ tissue of RT and high metabolic rates, were observed in the UW group (78.3%) in comparison to the OB group (60.7%). Conclusion: This approach provides a new opportunity to examine energy metabolism for individual differences of pediatric populations. It is an applicable strategy both to prescribe exercises and to administer diets to this population, as it reveals the magnitude of heat-producing body components.
DOI: 10.6084/m9.figshare.6318401.v1
title: Socio-demographic factors influences on guardians’ perception of Developmental Coordination Disorder among Brazilian schoolchildren

description: Abstract AIM The objective of this study was to identify socio-demographic factors that are associated with the guardians’ perception of developmental coordination disorder among schoolchildren from seven to ten years old. METHODS The parents/guardians of 361 children completed the Developmental Coordination Disorder Questionnaire (DCDQ) and a socio-demographic questionnaire in this cross-sectional study. The univariate relationship between the DCDQ and socio-demographic factors was tested by the chi-square test. The odds ratio (OR) with 95% confidence interval was calculated. Socio-demographic variables with p≤0.20 were included in the logistic regression analysis. RESULTS The child's age (B = 0.40; OR = 1.49; p &lt;0.01) and the guardian undergoing treatment for illness (B = 0.97; OR = 2.65; p = 0.02) were retained in the final regression model. CONCLUSION Thus, increasing children’s’ age and guardians undergoing treatment for illness increased the guardians’perception of developmental coordination disorder.
DOI: 10.6084/m9.figshare.14290252.v1
title: Parental education and perception of outdoor playing time for preschoolers

description: Abstract Aim: The objective of this study was to analyze whether or not socioeconomic positions influence outdoor playtime during the week (WK) and on the weekends (WEND). Methods: The sample consisted of 485 (girls; n=223) healthy preschoolers, aged from 3 to 6 years, enrolled in kindergartens from the metropolitan area of Porto, Portugal. Physical Activity (PA) was assessed for 7 consecutive days with an accelerometer. The time playing outdoors during the WK or the WEND was reported by parents. Anthropometric data (weight and height) was collected following standardized protocols. Socioeconomic position was assessed by Parental Education (PE), according to the Portuguese education system. Results: We found differences in time spent playing outdoors either for the WK or WEND, but not for Total PA (TPA), in both sexes. However, regression analysis showed that after age adjustment, BMI and TPA for both sexes, we only found significant associations between low PE (LPE) and high PE (HPE) groups on WK or WEND. However, we found no statistically significant association for boys on the WK (p=0.06). Conclusion: Our findings suggest that socioeconomic position can influence the children’s time spent in outdoor activities, especially on the weekends. This may have implications for future interventions with this age group.
DOI: 10.6084/m9.figshare.6125363
title: Dematerializing physical education in public schools: an indication of permanence

description: Abstract AIMS The objective of this study was to identify and analyze the most recurrent difficulties reported by Physical Education teachers of state and municipalized schools of the state of São Paulo, Brazil. METHODS The sample involved 13 cities (12 - Mogi-Mirim Region and 1 - São Paulo city), totaling 73 Physical Education teachers. Its research used a descriptive and exploratory methods and a questionnaire by instrument. The answers were analyzed using content analysis (Bardin, 2011). RESULTS As a result, the most reported difficulty, from both samples, was the lack, in quantity and in quality, of materials. Other difficulties were reported, like: inadequate physical space, indiscipline and demotivation of students. CONCLUSION We conclude that the material problem is a permanent difficulty in this discipline at school.
DOI: 10.6084/m9.figshare.6125363.v1
title: Dematerializing physical education in public schools: an indication of permanence

description: Abstract AIMS The objective of this study was to identify and analyze the most recurrent difficulties reported by Physical Education teachers of state and municipalized schools of the state of São Paulo, Brazil. METHODS The sample involved 13 cities (12 - Mogi-Mirim Region and 1 - São Paulo city), totaling 73 Physical Education teachers. Its research used a descriptive and exploratory methods and a questionnaire by instrument. The answers were analyzed using content analysis (Bardin, 2011). RESULTS As a result, the most reported difficulty, from both samples, was the lack, in quantity and in quality, of materials. Other difficulties were reported, like: inadequate physical space, indiscipline and demotivation of students. CONCLUSION We conclude that the material problem is a permanent difficulty in this discipline at school.
DOI: 10.6084/m9.figshare.6318392
title: Acute melatonin administration enhances aerobic tolerance: an analysis of biochemical and hematological parameters

description: Abstract Aims This study is aimed at testing the acute melatonin administration (oral; 6 mg) on aerobic tolerance at cycloergometer and analyzing the consequences on biochemical and hematological parameters. Methods The maximal aerobic capacity intensity (iMAC) at cycloergometer of eleven male healthy men (24.18±3.92 years-old; 87.07±12.48 kg; 1.82±0.05 m; 26.18±3.63 kg/m2; and 16.28±5.77 % of fat) was individually determined and used to perform a time to exhaustion (tlim) trial of 30 minutes after melatonin or placebo administration. We observed 48-72h interval between tests, performed in a double-blind experiment design. In order to determine hematological and biochemical parameters we collected venous blood samples before and after tlim. Statistical significance was set at 5%. Results The intensity and the lactatemia corresponding to the maximal aerobic capacity were 120.88±18.78 W and 3.32±1.03 mmol.L-1, respectively. The tlim with placebo (33.94±15.26 min, confidence interval = 24.92 - 42.95) was significantly lower than the tlim with melatonin (41.94±17.22 min; CI = 31.76 - 52.12; p = 0.03; 19.06%; effect size = 0.49). All of the 21 analyzed blood physiological variables resulted in no significant variation after tlim when placebo was compared to melatonin, except for total sera cholesterol (lower after exercise with melatonin). Conclusion Acute melatonin administration enhanced aerobic tolerance at iMAC in 19% at cycloergometer; however, the biochemical and hematological variables assessed were not significantly modulated.
DOI: 10.6084/m9.figshare.6318392.v1
title: Acute melatonin administration enhances aerobic tolerance: an analysis of biochemical and hematological parameters

description: Abstract Aims This study is aimed at testing the acute melatonin administration (oral; 6 mg) on aerobic tolerance at cycloergometer and analyzing the consequences on biochemical and hematological parameters. Methods The maximal aerobic capacity intensity (iMAC) at cycloergometer of eleven male healthy men (24.18±3.92 years-old; 87.07±12.48 kg; 1.82±0.05 m; 26.18±3.63 kg/m2; and 16.28±5.77 % of fat) was individually determined and used to perform a time to exhaustion (tlim) trial of 30 minutes after melatonin or placebo administration. We observed 48-72h interval between tests, performed in a double-blind experiment design. In order to determine hematological and biochemical parameters we collected venous blood samples before and after tlim. Statistical significance was set at 5%. Results The intensity and the lactatemia corresponding to the maximal aerobic capacity were 120.88±18.78 W and 3.32±1.03 mmol.L-1, respectively. The tlim with placebo (33.94±15.26 min, confidence interval = 24.92 - 42.95) was significantly lower than the tlim with melatonin (41.94±17.22 min; CI = 31.76 - 52.12; p = 0.03; 19.06%; effect size = 0.49). All of the 21 analyzed blood physiological variables resulted in no significant variation after tlim when placebo was compared to melatonin, except for total sera cholesterol (lower after exercise with melatonin). Conclusion Acute melatonin administration enhanced aerobic tolerance at iMAC in 19% at cycloergometer; however, the biochemical and hematological variables assessed were not significantly modulated.
DOI: 10.6084/m9.figshare.6388718
title: Motor learning in post stroke subjects: the effects of practice conditions on the temporal synchronization

description: Abstract AIMS The aim of this study was to investigate the effects of practice schedule on the motor learning of a synchronization timing task in post-stroke subjects. Subjects and METHODS Seventeen post-stroke individuals were assigned to the experimental group and for the control group were selected seventeen healthy individuals. At the acquisition phase, all participants performed 30 trials of a coincident timing task. Nine individuals from each group practiced constantly and eight from each group practiced randomly, with speed changes in the task. Subsequent phases included: 1) immediate transfer test and 2) long term transfer test after 3 days. Data were analyzed in relation to absolute, variable, and constant errors to assess the performance concerning accuracy, consistence, and direction of responses, respectively. RESULTS All groups increased their accuracy through the practice and were able to adapt it in different speeds. The stroke subjects were more variable in their motor responses. There was no effect of the practice schedule on motor learning, regardless the presence or absence of the neurologic damage. CONCLUSION Post stroke individuals were able to learn a synchronizing task and the capacity of adapt their performance after speed perturbation was preserved. There was no effect of the practice schedule on motor learning.
DOI: 10.6084/m9.figshare.6388454
title: Efficacy of neurofunctional versus resistance training in improving gait and quality of life among patients with Parkinson’s disease: a randomized clinical trial

description: Abstract AIMS to compare the efficacy of neurofunctional training versus resistance training in improving gait and quality of life among patients with PD METHODS This randomized controlled trial included 40 participants randomly assigned to two groups through random number table generator: resistance training (RT) (n=19) and neurofunctional training (NT) (n=21). The RT group performed resistance exercises emphasizing the lower limbs and trunk, while the NT group sessions were focused on gait, functional independence and balance training. Trained physical therapists supervised both groups. The training sessions lasted 60 minutes in each group and were performed twice a week, totalizing 24 sessions. The outcomes, gait and quality of life, were measured using video gait analysis and footprint analysis; and PDQL and PDQ-39 questionnaires, respectively RESULTS intra-group comparison revealed all gait variables (stride length, step length, number of steps, time of distance walked, gait speed and cadence) improved after the NT intervention with large effect size, while only stride length improved in the RT group with moderate effect size. The between group analyses means (Δ) shows that all the variables presented statistically significant differences in the NT group. Additionally, both groups showed significant improvements in quality of life. CONCLUSIONS The application of specific neurofunctional training, directed and enriched with sensorial resources, resulted in superior gait performance among individuals with PD when compared to those in the resistance training group; both treatments were efficacious in improving quality of life.
DOI: 10.6084/m9.figshare.6124628
title: Translation and validation of the perceived locus of causality questionnaire (PLOCQ) in a sample of portuguese physical education students

description: Abstract AIM This study main aim was to translate and validate one of the most used SDT-based instruments to assess motivation in PE classes, the Perceived Locus of Causality Questionnaire (PLOCQ), to the Portuguese context. METHOD Sample was composed of 652 boys (M=15.4 years; SD=1.90) and 702 girls (M=15.47 years; SD=1.95), enrolled in physical education classes in several Portuguese schools. RESULTS The analysis provided support for a five factors and 18 items model, after excluding two items (χ² = 491.473, df = 125, p =