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Sökning: WFRF:(Boldemann Cecilia)

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  • Boldemann, Cecilia, et al. (författare)
  • Impact of preschool environment upon children's physical activity and sun exposure.
  • 2006
  • Ingår i: Preventive medicine. - 0091-7435. ; 42:4, s. 301-8
  • Tidskriftsartikel (refereegranskat)abstract
    • The physical qualities of outdoor environments are important to trigger healthy behavior in children. We studied the impact of outdoor environments upon spontaneous physical activity and exposure to ultraviolet (UV) radiation in 4- to 6-year-old children at 11 preschools in Stockholm county.
  • Fröberg, Andreas, 1985-, et al. (författare)
  • Accelerometer-measured physical activity among adolescents in a multicultural area characterized by low socioeconomic status
  • 2018
  • Ingår i: International Journal of Adolescent Medicine and Health. - 0334-0139. ; 30:3
  • Tidskriftsartikel (refereegranskat)abstract
    • PURPOSE: The aim of this cross-sectional study was to describe and analyze accelerometer-measured sedentary time and physical activity (PA) among adolescents in a multicultural area characterized by low socioeconomic status (SES). METHOD: Seventh-graders (n=114 (girls n=66), mean age: 12.8±0.5 y) were recruited from three schools in a multicultural area of the city of Gothenburg, Sweden. Sedentary time and PA were measured with ActiGraph™ accelerometers. RESULT: Of total wear-time, 70 (±6)% was sedentary, with girls being more sedentary than boys. Girls had less light PA (LPA) and moderate-to-vigorous PA (MVPA) than boys. Similar patterns were shown during in-school and out-of-school hours. During wear-time, 53% had a mean of ≥60 min of MVPA per day, but only 6% of the girls and 24% of the boys were sufficiently physically active every day. Girls had more sedentary bouts of ≥10 min and fewer MVPA bouts of ≥5 min per day than boys. Those who participated in organized sports spent a mean of 15 more minutes of MVPA per day compared to those who did not. No association was observed between body mass index (BMI) and sedentary time and PA. CONCLUSION: Only a few adolescents from a Swedish multicultural area characterized by low SES met the PA recommendations every day, and girls were more sedentary and less physically active than boys. Adolescents involved in organized sports had more of MVPA per day than their non-involved peers. Sedentary time and PA were not related to BMI.
  • Fröberg, Andreas, 1985-, et al. (författare)
  • Combinations of epoch durations and cut-points to estimate sedentary time and physical activity among adolescents
  • 2017
  • Ingår i: Measurement in Physical Education and Exercise Science. - 1091-367X .- 1532-7841. ; 21:3, s. 154-160
  • Tidskriftsartikel (refereegranskat)abstract
    • The purpose of the current study was to investigate how combinations of different epoch durations and cut-points affect the estimations of sedentary time and physical activity in adolescents. Accelerometer data from 101 adolescents were derived and 30 combinations were used to estimate sedentary time, light, moderate, vigorous, and combined moderate-to-vigorous physical activity. Data were analyzed with repeated measurement analyses of variance. Large differences of sedentary time and times of different physical activity intensities were observed between 1 s and longer epoch durations using virtually all cut-points. Generally, sedentary time, moderate physical activity, vigorous physical activity, and combined moderate-to-vigorous physical activity progressively decreased, whereas light physical activity increased with longer epoch durations. The extreme differences between cut-points were large and increased with longer epoch durations for sedentary time and for all physical activity intensities except for vigorous physical activity per epoch duration. Caution is required when cross-comparing studies using different epoch durations and cut-points. To accurately register adolescents’ spontaneous intermittent physical activity behavior, short epoch durations are recommended.
  • Pagels, Peter, et al. (författare)
  • Suberythemal Sun Exposures at Swedish Schools Depend on Sky Views of the Outdoor Environments - Possible Implications for Pupils' Health.
  • 2016
  • Ingår i: Photochemistry and Photobiology. - American Society for Photobiology. - 0031-8655. ; 92:1, s. 201-207
  • Tidskriftsartikel (refereegranskat)abstract
    • More scheduled outdoor stay is increasingly advocated for school children. This study measured 2(nd) , 5(th) and 8(th) graders' erythemal UV-exposure in September, March and May at four Swedish schools. We related those exposures, as fractions of total available ambient radiation, to the schools outdoor environments differing in amount of shade, vegetation, and peripheral city-scape quantified as percentage of free sky view calculated from fish-eye photographs. Exposures correlated to the sky views (with exceptions in May) and were suberythemal. The exposures were also below the threshold limit of the International Commission on Non-Ionizing Radiation Protection (ICNIRP) for hazard evaluation of UVR but were potentially enough for adequate vitamin D formation according to a cited model calculation - as illustrated in the results and discussed. The school environments, typical in southern and middle Sweden, offer enough shade to protect children from overexposure during seasons with potentially harmful solar UV radiation. Pupils' outdoor stay may be extended during September and March. In May extended outdoor stay of the youngest pupils requires a more UVR-protective environment. This article is protected by copyright. All rights reserved.
  • Raustorp, Anders, 1958-, et al. (författare)
  • Accelerometer Measured Level of Physical Activity Indoors and Outdoors During Preschool Time in Sweden and the United States.
  • 2012
  • Ingår i: Journal of physical activity & health. - 1543-5474. ; 9:6, s. 801-808
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: It is important to understand the correlates of physical activity in order to influence policy and create environments that promote physical activity among preschool children. We compared preschoolers' physical activity in Swedish and in US settings and objectively examined differences boys´ and girls´ indoor and outdoor physical activity regarding different intensity levels and sedentary behaviour. METHODS: Accelerometer determined physical activity in 50 children with mean age 52 months, (range 40-67) was recorded during preschool time for 5 consecutive weekdays at four sites. The children wore an Actigraph GTIM Monitor. RESULTS: Raleigh preschool children, opposite to Malmö preschoolers spent significantly more time indoors than outdoors (p<.001). Significantly more moderate vigorous intensity physical activity (MVPA) was observed outdoors (p<.001) in both settings. Malmö children accumulated significantly more counts/min indoors (p<.001). The percent of MVPA during outdoor time did not differ between children at Raleigh and Malmö. CONCLUSION: Physical activity counts/minutes was significantly higher outdoors vs. indoors in both Malmö and Raleigh. Malmö preschoolers spent 46% of attendance time outdoors compared to 18% for Raleigh preschoolers which could have influenced the difference in preschool activity between the two countries. Time spent in MVPA at preschool was very limited and predominantly adopted outdoors.
  • Raustorp, Anders, 1958-, et al. (författare)
  • Physical activity decreased by a quarter in the 11-12 year old Swedish boys between 2000 and 2013 but was stable in girls. A smartphone effect?
  • 2015
  • Ingår i: Acta Paediatrica. - 0803-5253. ; 104:8
  • Tidskriftsartikel (refereegranskat)abstract
    • Aim This study explored physical activity, body mass index (BMI) and overweight and obesity from 2000-2013 using a convenience sample of second and fifth-grade Swedish schoolchildren aged 8-9 years and 11-12 years, respectively. Methods: We examined cross-sectional cohorts of 126 second-grade children in 2000, 84 in 2006 and 44 in 2013 and 105 fifth-grade children in 2000 and 38 in 2013. No fifth-graders were available in 2006. Physical activity data was collected based on pedometer readings over four consecutive weekdays and height and weight were measured. Identical instruments and procedures were used in all three years. Results: There was an increase in physical activity in second-grade girls from 2000-2006 (p<0,01), which then stabilised between 2006-2013, but second-grade boys and fifth-grade girls were stable throughout the study period. Fifth-grade boys decreased significantly (24%) from 16,670 to 12,704 steps per day (p<0,01) from 2000-2013. Mean BMI scores remained stable over time. Conclusion: Time trends in physical activity differed between boys and girls. Second-grade boys and fifth-grade girls were stable throughout, whereas second-grade girls increased from 2000-2006 before stabilising. Fifth-grade boys showed a significant 24% reduction from 2000-2013. Changes in recess and leisure-time habits, such as smartphone use, may have influenced the result.
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