The high prevalence and increasing incidence of skin cancer (SC) is a significant public health problem. We can address its main risk factor, which is incident and accumulated solar radiation, and ...its damages by disseminating knowledge and promoting changes in habits and attitudes toward the sun. The influence of teachers in the education of young people is crucial. Physical education teachers (PET) spend the majority of their time outdoors, thereby exposing themselves to solar radiation daily and greatly increasing the risk of SC. We carried out a case–control study matching for age and gender through surveys about photoexposure and photoprotection habits on a sample of 200 teachers (100 PET and 100 non‐PET) on South of Spain. The results confirmed that there is a significant difference in sun exposure during the workday; PET group showed higher exposure (P < 0.01). We ascertained that photoprotection habits are deficient across the population. These data contribute to the understanding of the danger associated with poor sun protection among teachers (primary and secondary school teachers) and its mitigation. It is also worth noting that future prevention campaigns will be necessary for the subsequent correct transmission of the habits to students.
The high prevalence and increasing incidence of skin cancer (SC) are significant public health problems. We can address its main risk factor, which is incident and accumulated solar radiation, and its damages by disseminating knowledge and promoting changes in habits and attitudes toward the sun. We carried out a study through surveys about photoexposure and photoprotection habits during the workday of 200 teachers. We ascertained that photoprotection habits are deficient across the population. These data contribute to the understanding of the danger associated with poor sun protection among teachers.
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BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
To examine the longitudinal relationships between objectively measured total volume and specific intensities of physical activity (PA) with academic performance in a large sample of youth aged 6‐18 ...years. A longitudinal study of 1046 youth (10.04 ± 3.10 years) from Spain was followed over 2 years. PA (volume and intensity) was measured by accelerometry. Academic performance was assessed through grades reported on the transcript at the end of the academic year (Mathematics, Language, an average of these two core subjects, and grade point average GPA). Longitudinal relationships between PA and four indicators of academic performance were examined using covariance and regression analyses, adjusted for a variety of confounders. Youth Quartile 2 for PA volume at baseline obtained better scores than those who participated in Quartiles 1 or 4 volumes of PA in GPA 2 years later (p = 0.006). There were generally no longitudinal associations between specific PA intensities and any of the academic performance indicators (all p > 0.170). However, a change in light PA over 2 years was inversely associated with three academic indicators in youth (βrange, ‐.103 to ‐ 090; all P < 040). Findings suggest that participants in Quartile 2 volume of PA had a better GPA in comparison with Quartiles 1 and 4 volumes of PA during youth, but there was no association with changes in PA volume over time. PA intensity was generally unrelated to academic performance during youth. However, there was an inverted u‐shape relationship between light PA changes and GPA.
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BFBNIB, FSPLJ, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
Aim
There is an emerging body of evidence on the potential effects of regular physical activity on academic performance. The aim of this study was to add to the debate, by examining the association ...between objectively measured physical activity and academic performance in a relatively large sample of children and adolescents.
Methods
The Spanish UP & DOWN study is a 3‐year longitudinal study designed to assess the impact, overtime, of physical activity and sedentary behaviours on health indicators. This present analysis was conducted with 1778 children and adolescents aged 6–18 years. Physical activity was objectively measured by accelerometry. Academic performance was assessed using school grades.
Results
Physical activity was inversely associated with all academic performance indicators after adjustment for potential confounders, including neonatal variables, fatness and fitness (all p < 0.05). This association became nonsignificant among quartiles of physical activity. There were only slight differences in academic performance between the lowest and the second quartile of physical activity, compared to the highest quartile, with very small effect size (d < 0.20).
Conclusion
Objectively measured physical activity may influence academic performance during both childhood and adolescence, but this association was negative and very weak. Longitudinal and intervention studies are necessary to further our understanding.
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BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
ABSTRACTFernandez-Santos, JR, Ruiz, JR, Cohen, DD, Gonzalez-Montesinos, JL, and Castro-Piñero, J. Reliability and validity of tests to assess lower body muscular power in children. J Strength Cond ...Res 29(8)2277–2285, 2015—The purpose of this study was to analyze the reliability and the criterion-related validity of several lower-body muscular power tests (i.e., standing long jump SLJ, squat jump, countermovement jump, and Abalakov jump) in children aged 6–12 years. Three hundred sixty three healthy children (168 girls) agreed to participate in this study. All the lower-body muscular power tests were performed twice (7 days apart), whereas the 1 repetition maximum (1RM) leg extension test was performed 2 days after the first session of testing. All the tests showed a high reliability (intertrial difference close to 0 and no significant differences between trials, all p > 0.05). The association between the lower-body muscular power tests and 1RM leg extension test was high (all p < 0.001). The SLJ and the Abalakov jump tests showed the highest association with 1RM leg extension test (R = 0.700, test result, weight, height, sex, and age were added in the model). The SLJ test can be a useful tool to assess lower-body muscular power in children when laboratory methods are not feasible because it is practical, time efficient, and low in cost and equipment requirements.
Optimal management of free-ranging herbivores requires the accurate assessment of an animal's nutritional status. For this purpose 'near-infrared reflectance spectroscopy' (NIRS) is very useful, ...especially when nutritional assessment is done through faecal indicators such as faecal nitrogen (FN). In order to perform an NIRS calibration, the default protocol recommends starting by generating an initial equation based on at least 50-75 samples from the given species. Although this protocol optimises prediction accuracy, it limits the use of NIRS with rare or endangered species where sample sizes are often small. To overcome this limitation we tested a single NIRS equation (i.e., multispecies calibration) to predict FN in herbivores. Firstly, we used five herbivore species with highly contrasting digestive physiologies to build monospecies and multispecies calibrations, namely horse, sheep, Pyrenean chamois, red deer and European rabbit. Secondly, the equation accuracy was evaluated by two procedures using: (1) an external validation with samples from the same species, which were not used in the calibration process; and (2) samples from different ungulate species, specifically Alpine ibex, domestic goat, European mouflon, roe deer and cattle. The multispecies equation was highly accurate in terms of the coefficient of determination for calibration R2 = 0.98, standard error of validation SECV = 0.10, standard error of external validation SEP = 0.12, ratio of performance to deviation RPD = 5.3, and range error of prediction RER = 28.4. The accuracy of the multispecies equation to predict other herbivore species was also satisfactory (R2 > 0.86, SEP < 0.27, RPD > 2.6, and RER > 8.1). Lastly, the agreement between multi- and monospecies calibrations was also confirmed by the Bland-Altman method. In conclusion, our single multispecies equation can be used as a reliable, cost-effective, easy and powerful analytical method to assess FN in a wide range of herbivore species.
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DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Background
The combined effect of cardiorespiratory fitness (CRF) and body mass index (BMI) on cardiovascular disease (CVD) risk in young people remains to be fully determined. We examined the ...individual and combined associations of CRF and BMI with clustered CVD risk factors, and the mediator role of BMI in the association between CRF and clustered CVD risk factors in children and adolescents.
Methods
237 children (111 girls) and 260 adolescents (120 girls) were included in this cross‐sectional study. Height and weight were assessed and BMI was calculated. A CVD risk factor index (CVDRF‐I) was computed from: waist circumference, systolic blood pressure, triglycerides, high‐density lipoprotein cholesterol and glucose. CRF was assessed using the 20‐m shuttle run test. Regression analysis, analysis of covariance and mediation analysis (Baron and Kenny procedures) were used to test the independent and combined effect of CRF and BMI on CVDRF‐I, and to test mediation hypothesis, respectively.
Results
CRF was negatively associated with CVDRF‐I (all P < 0.05); however, after adjusting for BMI the associations were no longer significant in children and adolescents of both sex groups. Contrary, the association between BMI and CVDRF‐I was independent of CRF (all P < 0.001). The effect of CRF on CVDRF‐I was mediated by BMI. The percentage of the total effect of CRF on CVDRF‐I mediated by BMI for boys and girls children and boys and girls adolescents were 79.5%, 100%, 81.2% and 55.7%, respectively.
Conclusions
BMI is an independent predictor of CVDRF‐I and a mediator of the association between CRF and CVDRF‐I in children and adolescents. These results help to clarify the associations between CRF, weight status and cardiovascular health, suggesting that future CVD health would benefit from maintaining an optimal weight status.
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FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
Aims: The purposes of this research were to study the convergent validity of the Mode and Frequency of Commuting To and From School Questionnaire using objectively assessed steps and time spent in ...different physical activity intensities and to compare the self-reported versus objective journey time in Spanish youths. Methods: Three hundred and eighty-nine Spanish youth aged 7–19 years were asked to complete the questionnaire and wore an accelerometer for five days. The objective commuting distance and time from home to school were estimated using Google MapsTM. Results: There were significant differences between passive and walking participants on step numbers, sedentary time and physical activity levels (except for vigorous physical activity in children). For children, a mean difference of −4.03 minutes between objective measured and self-reported journey time was found (95% limits of agreement were 13.55 and −21.60 minutes). For adolescents, the mean difference was −1.39 minutes (95% limits of agreement were 15.23 and −18.02 minutes). Conclusions: The findings indicated that the Mode of Commuting To and From School Questionnaire showed a convergent validity to assess this behaviour in Spanish youths. Self-reported journey time for walking is comparable to Google MapsTM in adolescents but not in children.
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BFBNIB, NMLJ, NUK, OILJ, PNG, SAZU, UKNU, UL, UM, UPUK
We comprehensively assessed the criterion-related validity of existing field-based fitness tests used to indicate adult health (19–64 years, with no known pathologies). The medical electronic ...databases MEDLINE (via PubMed) and Web of Science (all databases) were screened for studies published up to July 2020. Each original study’s methodological quality was classified as high, low and very low, according to the number of participants, the description of the study population, statistical analysis and systematic reviews which were appraised via the AMSTAR rating scale. Three evidence levels were constructed (strong, moderate and limited evidence) according to the number of studies and the consistency of the findings. We identified 101 original studies (50 of high quality) and five systematic reviews examining the criterion-related validity of field-based fitness tests in adults. Strong evidence indicated that the 20 m shuttle run, 1.5-mile, 12 min run/walk, YMCA step, 2 km walk and 6 min walk test are valid for estimating cardiorespiratory fitness; the handgrip strength test is valid for assessing hand maximal isometric strength; and the Biering–Sørensen test to evaluate the endurance strength of hip and back muscles; however, the sit-and reach test, and its different versions, and the toe-to-touch test are not valid for assessing hamstring and lower back flexibility. We found moderate evidence supporting that the 20 m square shuttle run test is a valid test for estimating cardiorespiratory fitness. Other field-based fitness tests presented limited evidence, mainly due to few studies. We developed an evidence-based proposal of the most valid field-based fitness tests in healthy adults aged 19–64 years old.
An imbalance of tau isoforms containing either three or four microtubule-binding repeats causes frontotemporal dementia with parkinsonism linked to chromosome 17 (FTDP-17) in families with intronic ...mutations in the MAPT gene. Here we report equivalent imbalances at the mRNA and protein levels and increased total tau levels in the brains of subjects with Huntington's disease (HD) together with rod-like tau deposits along neuronal nuclei. These tau nuclear rods show an ordered filamentous ultrastructure and can be found filling the neuronal nuclear indentations previously reported in HD brains. Finally, alterations in serine/arginine-rich splicing factor-6 coincide with tau missplicing, and a role of tau in HD pathogenesis is evidenced by the attenuation of motor abnormalities of mutant HTT transgenic mice in tau knockout backgrounds.
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DOBA, IJS, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
Purpose: To examine the temporal trends of accelerometer-based total daily sedentary time (ST) and self-reported domain-specific sedentary behavior (SB) on weekdays and weekends in Spanish children. ...Method: A total of 560 (50.53% girls) children (4th graders) in 2011/12 from 23 Spanish schools and 462 (48.70% girls) children (4th graders) in 2017/18 from 19 schools across Cadiz participated. Hip-worn accelerometers and questionnaires were used to assess total daily ST and self-reported time in SB modalities, respectively. Results: The objectively measured total daily ST tended to increase in boys on weekdays and weekends. Time spent watching television (TV) decreased during the week and weekend days, while time surfing on the internet increased on weekdays and weekends. Playing video-games increased in boys during the weekends. The trend to increase the time spent on educational activities with a computer during the weekdays and weekends was accompanied by a reduction of the same activities without using a computer. There was a trend to increase reading for fun, talking on the phone and total time in other SB, on weekdays and weekends in boys and girls. Conclusion(s): Spanish boys tended to increase objectively measured total daily ST. Moreover, SB modalities have changed in recent years in children, replacing TV viewing by computer use for both educational and non-educational purposes, as well as by the use of smartphones or other sedentary activities that does not imply the presence of a screen. These findings highlight the need to promote interventions to decrease total daily ST and reduce SB activities.
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BFBNIB, FSPLJ, GIS, IJS, KISLJ, NUK, PNG, UL, UM, UPUK
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