The relationship between objectively measured sitting time, posture, and low back pain in sedentary employees during...

The purpose of this study was to examine the relationship between objectively measured sitting time, posture, and low back pain (LBP) in adults with full-time (≥ 40 h/week) sedentary "desk" jobs. Physical activity (PA) and sedentary behavior (SB) between work environments (home vs. office) were also compared during COVID-19.

Participants (N = 53; M _age = 41 ± 12years) were full-time employees in sedentary jobs during COVID-19. A survey with demographic, work environment, and LBP questions was completed; Thomas Test assessed poor hip posture. ActivPAL devices were worn for ≥ 4 valid days (≥ 10 h/d) to assess waking sitting time (min/d). Binomial logistic regressions examined sitting as a predictor of poor posture and LBP; ANOVAs compared PA and SB between work environments.

Objectively measured sitting (min/day) predicted poor hip posture (β = - 0.01, p < 0.046) but was not significant for LBP (β = 0.002, p < 0.43). Participants who worked from home had significantly higher sitting time (569 ± 111 vs. 477 ± 46 min/d; p < 0.04), higher muscle strengthening PA (2.2 ± 2 vs. 0.5 ± 1.2d/week p < 0.02), but no difference in aerobic PA (p < 0.15), than those who worked from an office.

Given the shift to remote work during COVID-19, employees are at high risk for postural compensations that lead to LBP due to high SB and poor work ergonomics at home. There is a need to develop home-based behavioral and exercise interventions to reduce sitting, help improve posture, and invest in proper ergonomic homework equipment.