20.500.12556/RUP-22871 Occupational and non-occupational device-measured movement behaviours and low back pain a compositional isotemporal substitution analysis Background: Physical activity, sedentary behaviour, and sleep were shown to be independently associated with low back pain (LBP). The aim of this cross-sectional study was to explore the associations between 24-hour movement behaviour compositions and the occurrence, severity, and estimated level of LBP impact on an individual’s life. Methods: A convenience sample of 197 adults (40% females, 37 ± 11 years of age) were asked to wear an activPAL accelerometer for at least 7 consecutive days to assess their time-use composition consisting of moderate- to vigorous-intensity physical activity (MVPA), light- intensity physical activity (LPA), sedentary behaviour (SB), and sleep and to complete a questionnaire on LBP and sociodemographic characteristics. Compositional isotemporal substitution analyses were conducted separately for the non-domain-specific and domain- specific (including occupational and non-occupational domains) movement behaviour compositions. Results: Reallocating time from MVPA to any other movement behaviour or from sleep to LPA was associated with a higher LBP impact score. For example, reallocating 60 min/day from MVPA to LPA was associated with on average 17 points (95% CI: 6 to 28) higher LBP impact score (on a 0-70 scale). We did not find significant associations between the domain- specific time-use composition and LBP impact score (p = 0.060). We also did not find significant associations of the time-use compositions with occurrence and severity of LBP (p- value range: 0.067 to 0.649). Conclusion: Our study suggests that LBP sufferers with higher MVPA and sleep better cope with LBP. The differences in the LBP impact scores associated with theoretical reallocations between movement behaviours may be deemed clinically important. Future longitudinal and experimental studies in population-representative samples are needed to confirm our findings. Ozadje Telesna dejavnost, sedentarno vedenje in spanje so se izkazali kot neodvisno povezani z bolečino v spodnjem delu hrbta (LBP). Namen te presečne študije je bil raziskati povezave med kompozicijo 24-urnega gibalnega vedenja ter pojavnostjo, resnostjo in ocenjenim vplivom LBP na življenje posameznika. Metode Priložnostni vzorec 197 odraslih (40 % žensk, starost 37 ± 11 let) je bil zaprošen, da vsaj 7 zaporednih dni nosijo merilnik activPAL za oceno njihove kompozicije, ki vključuje zmerno do visoko intenzivno telesno dejavnost (MVPA), nizko intenzivno telesno dejavnost (LPA), sedentarno vedenje (SB) in spanje, ter izpolnijo vprašalnik o LBP in sociodemografskih značilnostih. Analiza kompozicijske isotemporalne substitucije je bila izvedena ločeno za kompozicije gibalnega vedenja po domenah (na delu, izven dela) in brez domen. Rezultati Preusmerjanje časa iz MVPA v katerokoli drugo obliko gibalnega vedenja ali iz spanja v LPA je bilo povezano z višjo oceno vpliva LBP. Na primer, prerazporeditev 60 minut na dan iz MVPA v LPA je bila v povprečju povezana s 17 točkami (95 % IZ: 6 do 28) višjo oceno vpliva LBP (na lestvici od 0 do 70). Nismo ugotovili statistično značilnih povezav med kompozicijo, ki vključuje gibalno vedenje po domenah in oceno vpliva LBP (p = 0,060). Prav tako nismo ugotovili pomembnih povezav med kompozicijo porabe časa in pojavnostjo ter resnostjo LBP (razpon p-vrednosti: 0,067 do 0,649). Zaključek Naša študija nakazuje, da se posamezniki z LBP, ki imajo več MVPA in spijo več, bolje spopadajo z bolečino. Razlike v ocenah vpliva LBP, povezane s teoretičnimi prerazporeditvami med gibalnimi vedenji, lahko smatramo kot klinično pomembne. Za potrditev naših ugotovitev so potrebne prihodnje longitudinalne in eksperimentalne študije na reprezentativnih vzorcih. musculoskeletal health physical behaviours time-use epidemiology kostno-mišično zdravje gibalno vedenje epidemiologija porabe časa true false true Angleški jezik Slovenski jezik Članek v reviji 2026-03-30 14:26:40 2026-03-30 14:26:43 2026-03-31 03:07:03 0000-00-00 00:00:00 2026 0 0 str. 1-25 Vol. [in press] 2026 0000-00-00 Zaloznikova NiDoloceno NiDoloceno 0000-00-00 0000-00-00 2026-03-12 616.721:613.7 1471-2474 10.1186/s12891-026-09678-0 273595395 RAZ_Kastelic_Kaja_2026.pdf RAZ_Kastelic_Kaja_2026.pdf 1 D892BB7042F963371EA814174666AF04 03a8777d9bf00d75e3f7d5ff0acbe0424e8ca0b9f6402a50fcf0a40b23cd0f42 e2aa7ead-2c33-11f1-9e8d-005056ac49c0 https://repozitorij.upr.si/Dokument.php?lang=slv&id=33385 https://link.springer.com/article/10.1186/s12891-026-09678-0 1 ae56b03d-2c33-11f1-9e8d-005056ac49c0 https://repozitorij.upr.si/Dokument.php?lang=slv&id=33384 Fakulteta za vede o zdravju Inštitut Andrej Marušič Univerza na Primorskem 0 0 0