The Effectiveness of Interventions to Reduce Sedentary Time in Different Target Groups and Settings in Germany: Systematic Review, Meta-Analysis and Recommendations on Interventions

Sedentary behavior modified the association between depression and risk of all-cause deaths in hypertensive population

OBJECTIVE

The pathogenic mechanism of depression involves chronic inflammation, which can be affected by sedentary behavior. This study aimed to determine whether sedentary behavior modified the association between depression and risk of death in the hypertensive population.

METHODS

Data from the National Health and Nutrition Examination Survey (2007-2018) was analyzed. Depression was assessed through the Health Questionnaire-9, and sedentary behavior was evaluated using self-reported sitting hours in a day. Deaths were ascertained through the National Death Index until 31 December 2019. The interaction effect was evaluated through multivariable Cox regression analysis.

RESULTS

Eight thousand one hundred and twenty-four patients with hypertension were involved in the study. During a median follow-up of 7.3 years, we confirmed 1384 all-cause and 373 cardiovascular deaths. Separate analyses revealed that both depression and sitting for 6 h per day or more were correlated with increased risks of all-cause and cardiovascular deaths. Of note, we found that sitting time modified the link between depression and the risk of all-cause death (P for interaction: 0.02). Compared with the nondepression group, the depression group was correlated with an elevated risk of all-cause death among participants with sitting time of more than 6 h/day [hazard ratio 1.52, 95% confidence interval (CI) 1.22-1.91, P < 0.001], but not among participants with sitting time of less than 6 h/day (hazard ratio 0.95, 95% CI 0.65-1.39, P = 0.76).

CONCLUSION

Sedentary behavior modified the link between depression and the risk of all-cause death. Reducing sedentary time might attenuate the detrimental effects of depression on survival in the hypertensive population.

Effective management of sedentary behavior among Indian university students: An empirical exploration into health-related behavior

BACKGROUND

The past few years have witnessed a notable rise in sedentary tendencies, unveiling a modern era of prolonged stillness and diminished physical engagement. This study sought to assess the feasibility of a digital health intervention (DHI) to reduce overall sedentary behavior among university students. The study also identifies distinct subgroups within Indian universities that exhibit a heightened propensity for engaging in unhealthy behaviors.

MATERIALS AND METHODS

The research design used was a quasi-experimental (pre-post) design. A total of 500 participants were selected using a simple randomized sampling method (250 belonging to the control group and 250 belonging to the experimental group). These participants actively engaged in the study for 2 weeks. The participants completed the Sedentary Behavior Questionnaire (SBQ) before the intervention to evaluate their level of sedentary behavior. To evaluate the impact of the intervention on subjectively measured sedentary behavior, statistical analyses were conducted using the paired-samples t-test and analysis of covariance (ANCOVA) with the post hoc Bonferroni test.

RESULTS

The findings demonstrated a significant t-value of sedentary behavior for the entire group, with t(249) = 4.88, P < .05. Furthermore, the F-value of 28.787 indicated a statistically significant difference in the sedentary behavior between the experimental and control groups. When considering female university students specifically, the t-value for sedentary behavior was significant at t(105) = 3.22, P < .05, and for male university students, the t-value for sedentary behavior was found to be significant at t(143) = 3.69, P < .05.

CONCLUSION

Smartphone-based health interventions targeting sedentary behavior reduction demonstrated promising outcomes in facilitating health behavior change among university students.

Walking and Playing with the Dog to Improve the Physical Activity Level of Adolescents: A Scoping Review

BACKGROUND

In recent years, new technologies such as the introduction of the smartphone and the tablet in everyday life and habits have often made adolescents sedentary. It is becoming a serious problem in society. It is important to propose, as soon as possible, proper and feasible programs to modify this trend. A solution should be to increase physical activity, reducing sedentary behaviors. Adopting dogs and walking and playing with them could be a solution, and the population should be sensitized about this aspect. Consequently, the objective of this scoping revision of the literature is to analyze the association between physical activity in adolescents and the presence of a dog in the family.

METHODS

Three electronic databases were screened until 21 February 2024. The detected articles were screened against the eligibility criteria. The results were narratively discussed.

RESULTS

After the screening process, a total of four studies were included. The studies presented heterogeneity in the physical activity assessment. This made it hard to synthesize the results. Indicatively, there is a positive association between physical activity and dog ownership.

CONCLUSIONS

walking and playing with the dog increase the physical activity level of adolescents. Therefore, a sensibilization campaign should highlight the importance of having dogs in families, especially in adolescence. It is fundamental to daily walk and play with them.

Association between sedentary behavior and Brain-Derived Neurotrophic Factor (BDNF) in children and adolescents: A protocol for systematic review and meta-analysis

BACKGROUND

There is evidence in the literature suggesting that high time spent in sedentary behavior (SB) can reduce the Brain-Derived Neurotrophic Factor (BDNF) levels, an important neurotrophin that plays a role in modulating cognition, learning and memory. Children and adolescents usually spend many hours a day on SB, either sitting for a long time and/or using screen equipment.

OBJECTIVE

The aim of this study is to describe a systematic review and meta-analysis protocol on the associations between SB and BDNF levels in children and adolescents.

METHODS

This protocol is guided by the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocols and was published in the International Prospective Register of Systematic Reviews database (PROSPERO: CRD42023392246). The databases that will be searched are EMBASE, Scopus, ScienceDirect, Web of Science, SPORTDiscus, CINAHL, and PubMed. Cross-sectional and cohort studies conducted with children and adolescents (5 to 19 yr) that analyzed the association between SB and BDNF will be included in the systematic review. The characteristics of the studies, methodological aspects, and main results will be described. Then, the risk of bias (assessed by STROBE and Newcastle-Ottawa scales) and the level of evidence (assessed by the GRADE tool) from included studies will be evaluated. Sub-group analysis will also be performed. Two experienced reviewers will perform the studies selection, data extraction, and methodological quality assessment.

CONCLUSION

This systematic review and meta-analysis will analyze the association between SB and BDNF in children and adolescents. The results will provide subsidies to better understand this relationship and will strengthen evidence-based practice for both health professionals and future researches.

Exploring Work-Time Affective States Through Ecological Momentary Assessment in an Office-Based Intervention to Reduce Occupational Sitting

BACKGROUND

The aim of this study was to examine whether a low-cost standing desk intervention that reduced occupational sitting was associated with changes in work-time cognitive-affective states in real time using ecological momentary assessments at the start and end of the trial.

METHODS

Forty-one office employees (91.7% female, mean age = 39.8 [10.1] y) were randomized to receive a low-cost standing desk or a waitlist control. Participants received 5 surveys each day for 5 workdays via smartphone application prior to randomization and at trial's end. Ecological momentary assessment assessed current work-time psychological states (valence and arousal, stress, fatigue, and perceived productivity). Multilevel models assessed whether changes in work-time outcomes over the course of the intervention were significantly different between treatment groups.

RESULTS

There were no significant differences in outcomes between the groups except for fatigue, with the control group reporting a significant decrease in daily fatigue following the intervention (P < .001). The intervention group reported no significant changes in any of the work-time outcomes across the study period (P > .05).

CONCLUSIONS

A low-cost standing desk intervention to reduce occupational sedentary behavior did not negatively impact work-time outcomes such as productivity and fatigue in the short term.