@article{BeckEngelReimers2022,
  author    = {Beck, Franziska and Engel, Florian A. and Reimers, Anne Kerstin},
  title     = {Compensation or displacement of physical activity in children and adolescents: a systematic review of empirical studies},
  series = {Children},
  volume    = {9},
  journal   = {Children},
  number    = {3},
  issn      = {2227-9067},
  doi       = {10.3390/children9030351},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-267231},
  year      = {2022},
  abstract  = {Regular physical activity during childhood and adolescence is associated with health benefits. Consequently, numerous health promotion programs for children and adolescents emphasize the enhancement of physical activity. However, the ActivityStat hypothesis states that increases in physical activity in one domain are compensated for by decreasing physical activity in another domain. Currently, little is known about how physical activity varies in children and adolescents within intervals of one day or multiple days. This systematic review provides an overview of studies that analyzed changes in (overall) physical activity, which were assessed with objective measurements, or compensatory mechanisms caused by increases or decreases in physical activity in a specific domain in children and adolescents. A systematic search of electronic databases (PubMed, Scopus, Web of Science, SportDiscus) was performed with a priori defined inclusion criteria. Two independent researchers screened the literature and identified and rated the methodological quality of the studies. A total of 77 peer-reviewed articles were included that analyzed changes in overall physical activity with multiple methodological approaches resulting in compensation or displacement. Of 40,829 participants, 16,265 indicated compensation associated with physical activity. Subgroup analyses separated by study design, participants, measurement instrument, physical activity context, and intervention duration also showed mixed results toward an indication of compensation. Quality assessment of the included studies revealed that they were of high quality (mean = 0.866). This review provides inconclusive results about compensation in relation to physical activity. A trend toward increased compensation in interventional studies and in interventions of longer duration have been observed.},
  language  = {en}
}
@article{WallmannSperlichDuekingMuelleretal.2022,
  author    = {Wallmann-Sperlich, Birgit and D{\"u}king, Peter and M{\"u}ller, Miriam and Frob{\"o}se, Ingo and Sperlich, Billy},
  title     = {Type and intensity distribution of structured and incidental lifestyle physical activity of students and office workers: a retrospective content analysis},
  series = {BMC Public Health},
  volume    = {22},
  journal   = {BMC Public Health},
  doi       = {10.1186/s12889-022-12999-z},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-301217},
  year      = {2022},
  abstract  = {Background Physical activity (PA) guidelines acknowledge the health benefits of regular moderate-to-vigorous physical activity (MVPA) regardless of bout duration. However, little knowledge exists concerning the type and intensity distribution of structured and incidental lifestyle PA of students and office workers. The present study aimed to i) assess the duration and distribution of intensity of MVPAs during waking hours ≥50\% of heart rate reserve (HRR), ii) to identify the type of PA through diary assessment, iii) to assign these activities into structured and lifestyle incidental PA, and iv) to compare this information between students and office workers. Methods Twenty-three healthy participants (11 students, 12 office workers) recorded heart rate (HR) with a wrist-worn HR monitor (Polar M600) and filled out a PA diary throughout seven consecutive days (i.e. ≥ 8 waking h/day). Relative HR zones were calculated, and PA diary information was coded using the Compendium of PA. We matched HR data with the reported PA and identified PA bouts during waking time ≥ 50\% HRR concerning duration, HRR zone, type of PA, and assigned each activity to incidental and structured PA. Descriptive measures for time spend in different HRR zones and differences between students and office workers were calculated. Results In total, we analyzed 276.894 s (76 h 54 min 54 s) of waking time in HRR zones ≥50\% and identified 169 different types of PA. The participants spend 31.9 ± 27.1 min/day or 3.9 ± 3.2\% of their waking time in zones of ≥50\% HRR with no difference between students and office workers (p > 0.01). The proportion of assigned incidental lifestyle PA was 76.9 ± 22.5\%. Conclusions The present study provides initial insights regarding the type, amount, and distribution of intensity of structured and incidental lifestyle PA ≥ 50\% HRR. Findings show a substantial amount of incidental lifestyle PA during waking hours and display the importance of promoting a physically active lifestyle. Future research could employ ambulatory assessments with integrated electronic diaries to detect information on the type and context of MVPA during the day.},
  language  = {en}
}
@article{NowackaChmielewskaGrabowskaGrabowskietal.2022,
  author    = {Nowacka-Chmielewska, Marta and Grabowska, Konstancja and Grabowski, Mateusz and Meybohm, Patrick and Burek, Malgorzata and Małecki, Andrzej},
  title     = {Running from stress: neurobiological mechanisms of exercise-induced stress resilience},
  series = {International Journal of Molecular Sciences},
  volume    = {23},
  journal   = {International Journal of Molecular Sciences},
  number    = {21},
  issn      = {1422-0067},
  doi       = {10.3390/ijms232113348},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-297407},
  year      = {2022},
  abstract  = {Chronic stress, even stress of a moderate intensity related to daily life, is widely acknowledged to be a predisposing or precipitating factor in neuropsychiatric diseases. There is a clear relationship between disturbances induced by stressful stimuli, especially long-lasting stimuli, and cognitive deficits in rodent models of affective disorders. Regular physical activity has a positive effect on the central nervous system (CNS) functions, contributes to an improvement in mood and of cognitive abilities (including memory and learning), and is correlated with an increase in the expression of the neurotrophic factors and markers of synaptic plasticity as well as a reduction in the inflammatory factors. Studies published so far show that the energy challenge caused by physical exercise can affect the CNS by improving cellular bioenergetics, stimulating the processes responsible for the removal of damaged organelles and molecules, and attenuating inflammation processes. Regular physical activity brings another important benefit: increased stress robustness. The evidence from animal studies is that a sedentary lifestyle is associated with stress vulnerability, whereas a physically active lifestyle is associated with stress resilience. Here, we have performed a comprehensive PubMed Search Strategy for accomplishing an exhaustive literature review. In this review, we discuss the findings from experimental studies on the molecular and neurobiological mechanisms underlying the impact of exercise on brain resilience. A thorough understanding of the mechanisms underlying the neuroprotective potential of preconditioning exercise and of the role of exercise in stress resilience, among other things, may open further options for prevention and therapy in the treatment of CNS diseases.},
  language  = {en}
}
@article{NeesKiermeierStrueweetal.2022,
  author    = {Nees, Juliane and Kiermeier, Senta and Struewe, Farina and Keymling, Myriam and Maatouk, Imad and Kratz, Christian P. and Schott, Sarah},
  title     = {Health behavior and cancer prevention among adults with Li-Fraumeni syndrome and relatives in Germany — a cohort description},
  series = {Current Oncology},
  volume    = {29},
  journal   = {Current Oncology},
  number    = {10},
  issn      = {1718-7729},
  doi       = {10.3390/curroncol29100614},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-290432},
  pages     = {7768 -- 7778},
  year      = {2022},
  abstract  = {Li-Fraumeni-syndrome (LFS) is a rare, highly penetrant cancer predisposition syndrome (CPS) caused by pathogenic variants (PVs) in TP53. Physical activity (PA) and a Mediterranean diet lead to cancer reduction or survival benefits and increased quality of life (QoL), but this is yet unstudied among LFS. TP53 PV carriers (PVC) and their relatives were questioned on dietary patterns (Mediterranean Diet Adherence Screener), PA (Freiburg Questionnaire), QoL (Short-form-Health-Survey-12), smoking, alcohol consumption and perception of cancer risk in a German bi-centric study from March 2020-June 2021. The study enrolled 70 PVC and 43 relatives. Women compared to men (6.49 vs. 5.38, p = 0.005) and PVC to relatives (6.59 vs. 5.51; p = 0.006) showed a healthier diet, associated with participation in surveillance (p = 0.04) and education (diet p = 0.02 smoking p = 0.0003). Women smoked less (2.91 vs. 5.91 packyears; p = 0.03), psychological well-being was higher among men (SF-12: males 48.06 vs. females 41.94; p = 0.004). PVC rated their own cancer risk statistically higher than relatives (72\% vs. 38\%, p < 0.001) however, cancer risk of the general population was rated lower (38\% vs. 70\%, p < 0.001). A relative's cancer-related death increased the estimated personal cancer risk (p = 0.01). The possibilities of reducing cancer through self-determined health behavior among PVC and relatives has not yet been exhausted. Educating families with a CPS on cancer-preventive behavior requires further investigation with regard to acceptance and real-life implementation.},
  language  = {en}
}