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Occupational and leisure-time physical activity and workload among construction workers - a randomized control study.

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Occupational physical activity (OPA) and leisure time physical activity (LTPA) in construction workers were quantified. A physical activity intervention did not decrease OPA, though overall energy expenditure reduced.

Keywords:
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Area of Science:

  • Occupational Health
  • Exercise Physiology
  • Workplace Wellness

Background:

  • Quantification of occupational physical activity (OPA) and leisure time physical activity (LTPA) is lacking among construction workers.
  • Construction work involves significant physical demands, impacting worker health and safety.
  • Understanding physical activity patterns is crucial for developing targeted health interventions.

Purpose of the Study:

  • To quantify physical activity energy expenditure (PAEE) in construction workers.
  • To assess physical workload during occupational tasks.
  • To evaluate the effect of a physical activity intervention on PAEE and OPA.

Main Methods:

  • Sixty-seven construction workers participated, with self-reported and directly assessed physical activity (PA).
  • Occupational PA (OPA) was observed using the "Posture, Activity, Tools and Handling" tool.
  • A 12-week PA intervention involved 3x20-minute training sessions per week for the intervention group.

Main Results:

  • Baseline median OPA was 5036 MET-min/week and LTPA 2842 MET-min/week.
  • Directly assessed OPA was 56.6 J/kg/min and LTPA was 35.7 J/kg/min.
  • Manual material handling comprised ≥25% of working time for over 50% of participants. Post-intervention, the training group showed reduced overall PAEE compared to controls, but not specifically during work.

Conclusions:

  • Occupational physical activity levels were within recommended guidelines but did not decrease following the PA intervention.
  • The PA intervention did not specifically reduce occupational physical activity.
  • Further research is needed to optimize interventions for reducing physical workload in construction.