Which of the following best represents the causes of stiff muscles?
a.
stiff muscles only result from overwork.
b.
stiff muscles only result from prolonged periods of inactivity.
c.
stiff muscles result from both over- and underworking them.
d.
stiff muscles are mostly the result of painful injuries.

Answer;

C. Stiff muscles result from both over- and underworking them.

Explanation;

Muscle stiffness is when the muscles feel tight and difficult to move, particularly after resting. Alongside sprains and strains, exercise or physical stress may cause muscle stiffness. A common cause of muscle stiffness is exercise or hard physical labor of some kind.

The most common cause of muscle stiffness is a sprain or strain, which can affect both the muscles and ligaments. Polymyalgia rheumatica causes muscle pain and stiffness.

a1 = unhealthy

a2= healthy

a3= healthy