Which of the following is an example of repetition as a stressor?

• A. Typing on a computer on a daily basis.
• B. Lifting a heavy object once.
• C. Resting between tasks.
• D. Taking breaks every hour.

Answer: (A)

Repetition as a stressor means that doing the same motion over and over creates cumulative strain over time. Typing on a computer daily involves constant, repetitive finger and wrist movements. Each keystroke is a small effort, but repeating it many times a day with little rest can build up microtrauma in the muscles and tendons, leading to overuse injuries like tendonitis or carpal tunnel syndrome.

The other options describe either a single exertion (lifting a heavy object once) or actions that promote rest and recovery (resting between tasks, taking breaks every hour), which don’t accumulate stress the same way. So the daily typing example best illustrates repetition as a stressor.