Institution
San Diego State University
Education•San Diego, California, United States•
About: San Diego State University is a education organization based out in San Diego, California, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 12418 authors who have published 27950 publications receiving 1192375 citations. The organization is also known as: SDSU & San Diego State College.
Topics: Population, Poison control, Health care, Mental health, Public health
Papers published on a yearly basis
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01 Jan 2002
TL;DR: Objective monitoring of physical activity in youth appears to be feasible and may provide more accurate prevalence rates than self-report measures.
Abstract: PURPOSE
To use objective monitoring of physical activity to determine the percentages of children and youth in a population that met physical activity guidelines.
METHODS
A total of 375 students in grades 1–12 wore an accelerometer (CSA 7164) for seven consecutive days. Bouts of continuous activity and accumulation of minutes spent in physical activity at various intensities were calculated to determine how many students met three physical activity guidelines.
RESULTS
Over 90% of students met Healthy People 2010, Objective 22.6 and nearly 70% met the United Kingdom Expert Consensus Group guideline, both of which recommend daily accumulation of moderate physical activity. Less than 3% met Healthy People 2010, Objective 22.7, which calls for bouts of continuous vigorous physical activity. For the United Kingdom Expert Consensus Group guideline, compliance decreased markedly with age, but gender differences were not statistically significant.
CONCLUSIONS
Prevalence estimates for compliance with national physical activity guidelines varied markedly for the three guidelines examined. Objective monitoring of physical activity in youth appears to be feasible and may provide more accurate prevalence rates than self-report measures.
458 citations
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TL;DR: This article reviews the extant literature on neurocognition, brain structure, and brain function in adolescent substance users with an emphasis on the most commonly used substances, and in the context of ongoing neuromaturational processes.
Abstract: Adolescence is a unique period in neurodevelopment. Alcohol and marijuana use are common. Recent research has indicated that adolescent substance users show abnormalities on measures of brain functioning, which is linked to changes in neurocognition over time. Abnormalities have been seen in brain structure volume, white matter quality, and activation to cognitive tasks, even in youth with as little as 1-2 years of heavy drinking and consumption levels of 20 drinks per month, especially if > 4-5 drinks are consumed on a single occasion. Heavy marijuana users show some subtle anomalies too, but generally not the same degree of divergence from demographically similar non-using adolescents. This article reviews the extant literature on neurocognition, brain structure, and brain function in adolescent substance users with an emphasis on the most commonly used substances, and in the context of ongoing neuromaturational processes. Methodological and treatment implications are provided.
456 citations
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Simon Fraser University1, Florida State University2, Oregon State University3, University of Cape Town4, University of California, Los Angeles5, University of Adelaide6, University of Tasmania7, University of Alaska Fairbanks8, Stanford University9, Norwegian Institute for Water Research10, Pontifical Catholic University of Chile11, University of California, Santa Barbara12, University of Auckland13, University of Western Australia14, University of California, Santa Cruz15, San Diego State University16, University of Maine17, Catholic University of the North18, Vancouver Island University19, Brown University20, University of Massachusetts Boston21
TL;DR: Although global drivers could be affecting kelp forests at multiple scales, local stressors and regional variation in the effects of these drivers dominate kelp dynamics, in contrast to many other marine and terrestrial foundation species.
Abstract: Kelp forests (Order Laminariales) form key biogenic habitats in coastal regions of temperate and Arctic seas worldwide, providing ecosystem services valued in the range of billions of dollars annually. Although local evidence suggests that kelp forests are increasingly threatened by a variety of stressors, no comprehensive global analysis of change in kelp abundances currently exists. Here, we build and analyze a global database of kelp time series spanning the past half-century to assess regional and global trends in kelp abundances. We detected a high degree of geographic variation in trends, with regional variability in the direction and magnitude of change far exceeding a small global average decline (instantaneous rate of change = −0.018 y−1). Our analysis identified declines in 38% of ecoregions for which there are data (−0.015 to −0.18 y−1), increases in 27% of ecoregions (0.015 to 0.11 y−1), and no detectable change in 35% of ecoregions. These spatially variable trajectories reflected regional differences in the drivers of change, uncertainty in some regions owing to poor spatial and temporal data coverage, and the dynamic nature of kelp populations. We conclude that although global drivers could be affecting kelp forests at multiple scales, local stressors and regional variation in the effects of these drivers dominate kelp dynamics, in contrast to many other marine and terrestrial foundation species.
455 citations
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TL;DR: SOPARC is a reliable and feasible instrument for assessing physical activity and associated contextual data in community settings and met acceptable criteria for area contexts.
Abstract: Background: New tools are needed to examine physical activity and the contexts in which it occurs. Community parks contribute to physical activity, but measuring activity and associated variables in them is challenging because area contexts change and the numbers and characteristics of users are highly variable. Methods: We developed SOPARC (System for Observing Play and Recreation in Communities) and tested its use by observing 16,244 individuals in 165 park areas. Reliabilities included 472 simultaneous measures by independent observers. Results: Correlations between observers on number of area participants was 0.99 for female and male park users. Reliabilities (i.e., percent agreement) for age (89%, females; 85%, males), race/ethnic (80%, females; 82%, males), and activity level (80%, females; 88%, males) groupings met acceptable criteria. Reliabilities for area contexts (i.e., usable, accessible, supervised, organized, equipped) exceeded 94%. Conclusions: SOPARC is a reliable and feasible instrument for assessing physical activity and associated contextual data in community settings.
455 citations
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TL;DR: A review of studies of physical activity in school and community settings among preschool through college-aged persons to determine characteristics and effects of interventions is presented in this article, with a focus on the impact of interventions on children.
454 citations
Authors
Showing all 12533 results
Name | H-index | Papers | Citations |
---|---|---|---|
David R. Williams | 178 | 2034 | 138789 |
James F. Sallis | 169 | 825 | 144836 |
Steven Williams | 144 | 1375 | 86712 |
Larry R. Squire | 143 | 472 | 85306 |
Murray B. Stein | 128 | 745 | 89513 |
Robert Edwards | 121 | 775 | 74552 |
Roberto Kolter | 120 | 315 | 52942 |
Jack E. Dixon | 115 | 408 | 47201 |
Sonia Ancoli-Israel | 115 | 520 | 46045 |
John D. Lambris | 114 | 651 | 48203 |
Igor Grant | 113 | 791 | 55147 |
Kenneth H. Nealson | 108 | 483 | 51100 |
Mark Westoby | 108 | 316 | 59095 |
Eric Courchesne | 107 | 240 | 41200 |
Marc A. Schuckit | 106 | 643 | 43484 |