What is a sign of physical stress?

• A. Difficulty concentrating and remaining focused
• B. Lack of work ethic
• C. Insomnia
• D. Low morale

Answer: (C)

Signs of physical stress show up in the body, especially in how sleep is affected. Insomnia—trouble falling asleep or staying asleep—is a direct sign that the body's stress response is active and disrupting recovery. When someone is under physical stress from long shifts, fatigue, illness, or sustained arousal, sleep quality often suffers, making insomnia a clear indication of physical strain.

Difficulty concentrating can stem from fatigue, but it’s a cognitive effect rather than a direct bodily stress signal. Lack of work ethic and low morale reflect motivation or mood, not the body's physical stress response.