The Heart Foundation of Australia has created a series of excellent workplace wellness posters targeting sedentary behaviour that can be printed off from their website.
Sit-Less PostersA range of four posters that act as a visual cue to prompt workers to stand or move more frequently in a workplace setting. These posters also provide imagery on ways that people can reduce extended sitting throughout the day.
Download your copies :
More workplace wellness resources are available via the Heart Foundation website.
Earlier this week we posted the abstract of a study concluding that sedentary behaviour may not have health effects independent of physical activity. David Dunstan and colleagues have responded with a comment on the article, available via PLOS ONE.
From the comment:
Maher and colleagues report findings from a secondary analysis of accelerometer data collected as part of the US National Health and Nutrition Examination Survey (NHANES). They found no associations of sedentary time with cardiometabolic risk biomarkers, when controlling for a measure of “total physical activity” that was composed of time spent in both moderate- to vigorous-intensity and light-intensity physical activity (that is, all non-sedentary time), weighted by intensity (accelerometer counts). On this basis, they concluded that sedentary time may not have health effects independent of physical activity. Leaving aside legitimate concerns with interpreting null results in this fashion, a broader conclusion that might be drawn is that there is limited (or no) merit in searching for “independent” effects of behaviours that are unavoidably “interdependent”.
Both the full article and the full comment are available via PLOS ONE.
A new study published in PLOS ONE suggests that sedentary behavior may not be associated with health independent of total physical activity. From the abstract:
Recent literature has posed sedentary behaviour as an independent entity to physical inactivity. This study investigated whether associations between sedentary behaviour and cardio-metabolic biomarkers remain when analyses are adjusted for total physical activity.
Cross-sectional analyses were undertaken on 4,618 adults from the 2003/04 and 2005/06 U.S. National Health and Nutrition Examination Survey. Minutes of sedentary behaviour and moderate-to-vigorous physical activity (MVPA), and total physical activity (total daily accelerometer counts minus counts accrued during sedentary minutes) were determined from accelerometry. Associations between sedentary behaviour and cardio-metabolic biomarkers were examined using linear regression.
Results showed that sedentary behaviour was detrimentally associated with 8/11 cardio-metabolic biomarkers when adjusted for MVPA. However, when adjusted for total physical activity, the associations effectively disappeared, except for C-reactive protein, which showed a very small, favourable association (β = −0.06) and triglycerides, which showed a very small, detrimental association (β = 0.04). Standardised betas suggested that total physical activity was consistently, favourably associated with cardio-metabolic biomarkers (9/11 biomarkers, standardized β = 0.08–0.30) while sedentary behaviour was detrimentally associated with just 1 biomarker (standardized β = 0.12).
There is virtually no association between sedentary behaviour and cardio-metabolic biomarkers once analyses are adjusted for total physical activity. This suggests that sedentary behaviour may not have health effects independent of physical activity.
The full study is available via the journal PLOS ONE.
New study suggests that prolonged sitting is linked to excess mortality. From Stone Hearth Newsletter:
Led by Cornell University nutritional scientist Rebecca Seguin, a new study of 93,000 postmenopausal American women found those with the highest amounts of sedentary time – defined as sitting and resting, excluding sleeping – died earlier than their most active peers. The association remained even when controlling for physical mobility and function, chronic disease status, demographic factors and overall fitness – meaning that even habitual exercisers are at risk if they have high amounts of idle time.
The full article is available via Stone Hearth Newsletter.
New paper published in the American Journal of Preventive Medicine. The abstract:
Desk-based office employees sit for most of their working day. To address excessive sitting as a newly identified health risk, best practice frameworks suggest a multi-component approach. However, these approaches are resource intensive and knowledge about their impact is limited.
To compare the efficacy of a multi-component intervention to reduce workplace sitting time, to a height-adjustable workstations-only intervention, and to a comparison group (usual practice).
Three-arm quasi-randomized controlled trial in three separate administrative units of the University of Queensland, Brisbane, Australia. Data were collected between January and June 2012 and analyzed the same year.
Desk-based office workers aged 20-65 (multi-component intervention, n=16; workstations-only, n=14; comparison, n=14).
The multi-component intervention comprised installation of height-adjustable workstations and organizational-level (management consultation, staff education, manager e-mails to staff) and individual-level (face-to-face coaching, telephone support) elements.
MAIN OUTCOME MEASURES:
Workplace sitting time (minutes/8-hour workday) assessed objectively via activPAL3 devices worn for 7 days at baseline and 3 months (end-of-intervention).
At baseline, the mean proportion of workplace sitting time was approximately 77% across all groups (multi-component group 366 minutes/8 hours [SD=49]; workstations-only group 373 minutes/8 hours [SD=36], comparison 365 minutes/8 hours [SD=54]). Following intervention and relative to the comparison group, workplace sitting time in the multi-component group was reduced by 89 minutes/8-hour workday (95% CI=-130, -47 minutes; p<0.001) and 33 minutes in theworkstations-only group (95% CI=-74, 7 minutes, p=0.285).
A multi-component intervention was successful in reducing workplace sitting. These findings may have important practical and financial implications for workplaces targeting sitting time reductions.
The full study is available via the American Journal of Preventive Medicine.
SBRN members have recently compiled a list of 12 different validated sedentary behaviour questionnaires, which are now available on the SBRN website. The questionnaires have been validated in age groups ranging from adolescence to the elderly, and in both population-based and clinical studies. If you have a questionnaire to add to the list (or a comment/correction) please email saunders (dot) travis (at) gmail (dot) com.
The full list is available here.
SBRN members Sebastien Chastin and colleagues have recently published the results of the first round of their Sedentary Behaviour Taxonomy project.
The abstract (via PLOS ONE):
Over the last decade, sedentary behaviors have emerged as a distinctive behavioral paradigm with deleterious effects on health independent of physical activity. The next phase of research is to establish dose response between sedentary behaviors and health outcomes and improve understanding of context and determinants of these behaviors. Establishing a common taxonomy of these behaviors is a necessary step in this process.
The Sedentary behavior International Taxonomy project was developed to establish a classification of sedentary behaviors by use of a formal consensus process.
The study follows a Delphi process in three Rounds. A preparatory stage informed the development of terms of reference documents. In Round 1, experts were asked to make statements about the taxonomy; 1) its purpose and use ; 2) the domains, categories or facets that should be consider and include; 3) the structure/architecture to arrange and link these domains and facets. In Round 2 experts will be presented with a draft taxonomy emerging from Round 1 and invited to comment and propose alterations. The taxonomy will then be finalised at the outset of this stage.
Results of Round 1 are reported here. There is a general consensus that a taxonomy will help advances in research by facilitating systematic and standardised: 1) investigation and analysis; 2) reporting and communication; 3) data pooling, comparison and meta-analysis; 4) development of measurement tools; 4) data descriptions, leading to higher quality in data querying and facilitate discoveries. There is also a consensus that such a taxonomy should be flexible to accommodate diverse purposes of use, and future advances in the field and yet provide a cross-disciplinary common language. A consensual taxonomy structure emerged with nine primary facets (Purpose, Environment, Posture, Social, Measurement, Associated behavior, Status, Time, Type) and the draft structure presented here for Round 2.
The full paper is available for free via the journal PLOS ONE.
On October 28 the American Academy of Pediatrics updated their media/screentime recommendations for children and youth, published in the journal Pediatrics. The paper includes recommendations for healthcare providers, schools, and parents.
Recommendations for parents:
- Limit the amount of total entertainment screen time to < 1 to 2 hours per day.
- Discourage screen media exposure for children < 2 years of age.
- Keep the TV set and Internet-connected electronic devices out of the child ’ s bedroom.
- Monitor what media their children are using and accessing, including any Web sites they are visiting and social media sites they may be using.
- Co-view TV, movies, and videos with children and teenagers, and use this as a way of discussing important family values.
- Model active parenting by establishing a family home use plan for all media. As part of the plan, enforce
a mealtime and bedtime “ curfew ” for media devices, including cell phones. Establish reasonable but
ﬁrm rules about cell phones, texting, Internet, and social media use.
The full set of recommendations are available in the journal Pediatrics.
Today’s post comes from Dr Dylan Cliff, a National Heart Foundation Postdoctoral Research Fellow at the University of Wollongong (Australia).
Many people interested in young people’s development are now aware that sedentary behaviours, particularly too much television viewing, can be harmful to health during childhood and adolescence. There are, however, currently a wide variety of approaches being used to measure sedentary behaviours in young people. This can make things confusing for those who are new to sedentary behaviour research such as clinicians, health promoters, educators, and researchers from different fields. It is important that researchers, practitioners and policy makers understand the strengths and weaknesses of different methods of assessing sedentary behaviours among young people, and have easy access to information about the most appropriate instruments to suit their needs.
With this in mind, members of the Physical Activity and Sedentary Behaviour Stream of the Australasian Child and Adolescent Obesity Research Network (ACAORN) have recently developed an online Method Selection Guide and published an accompanying ‘Hitchhiker’s Guide‘ to assist users in choosing instruments to measure sedentary behaviours among children and adolescents. This followed on from a systematic review conducted by the Stream to summarise the evidence on the validity and reliability of available measures of sedentary behaviours.
For the Method Selection Guides, Stream members developed decision flow charts to assist users in selecting an appropriate measure, identified attributes of each method and described five case scenarios to illustrate considerations associated with the selection of each method of measurement. The scenarios included a screen time intervention among preschoolers, a school-based intervention to reduce sitting during class-time among children, a treatment program for overweight/obese school children focused on reducing sedentary time, the primary prevention of adolescent screen time in a clinical setting, and an observational study to estimate the population prevalence of screen time among adolescents. In developing the Method Selection Guides, ACAORN’s Physical Activity and Sedentary Behaviour Stream aim to assist researchers and practitioners interested in understanding more about the measurement of sedentary behaviours in children and adolescents.
You can access the Method Selection Guide for free at http://www.acaorn.org.au/streams/activity/method-selection/sedentary.php.