Which ergonomic strategy reduces upper limb strain?

Which ergonomic strategy reduces upper limb strain?

• A. Increase task variety
• B. Ignore posture
• C. Use heavy tools
• D. Minimise frequency of tasks to reduce strain

Answer: (D)

Reducing how often the upper limbs are moved during a task lowers the cumulative load on muscles, tendons, and nerves. Repetitive motions cause small amounts of tissue damage over time, so performing tasks less frequently gives those tissues more recovery time and reduces the risk of overuse injuries like tendonitis or carpal tunnel syndrome. While varying tasks can help spread the workload and prevent one motion from dominating, it doesn’t guarantee a reduction in overall exposure if each task still happens at high frequency or with high force. Ignoring posture dramatically increases strain because awkward or sustained positions amplify stress on joints and soft tissues. Using heavy tools increases the amount of force the muscles and tendons must handle, raising, not lowering, risk.

Reducing how often the upper limbs are moved during a task lowers the cumulative load on muscles, tendons, and nerves. Repetitive motions cause small amounts of tissue damage over time, so performing tasks less frequently gives those tissues more recovery time and reduces the risk of overuse injuries like tendonitis or carpal tunnel syndrome.

While varying tasks can help spread the workload and prevent one motion from dominating, it doesn’t guarantee a reduction in overall exposure if each task still happens at high frequency or with high force. Ignoring posture dramatically increases strain because awkward or sustained positions amplify stress on joints and soft tissues. Using heavy tools increases the amount of force the muscles and tendons must handle, raising, not lowering, risk.