Provisional recommended weight limits for manual lifting during pregnancy

Area of Science:

• Occupational health and safety
• Maternal-fetal medicine
• Ergonomics

Background:

• Increasing prevalence of women in the workforce during pregnancy.
• Need for evidence-based guidelines on occupational lifting for pregnant workers.
• Addressing risks of overexertion injuries in pregnant employees.

Purpose of the Study:

• Adapt the National Institute for Occupational Safety and Health (NIOSH) Revised Lifting Equation (RNLE) for pregnant workers.
• Establish Recommended Weight Limits (RWLs) for occupational lifting during pregnancy.
• Develop clinical guidelines for managing lifting activities in pregnant workers.

Main Methods:

• Literature review on occupational lifting and maternal/fetal health.
• Evaluation of NIOSH lifting criteria for applicability to pregnant workers.
• Derivation of provisional RWLs using RNLE computational methods.

Main Results:

• Provisional RWLs for pregnant workers were determined.
• Guidelines recommend avoiding lifting below midshin and overhead.
• The derived thresholds aim to minimize risks to maternal and fetal health.

Conclusions:

• Presents lifting thresholds for healthy pregnant workers with uncomplicated pregnancies.
• Guidelines are largely consistent with earlier NIOSH recommendations for the general workforce.
• Implementation can protect millions of female workers from lifting-related health issues.