Question 1
When muscles find strength in stillness it is called

Isometric Contraction

Explanation:

Contractions in a muscle can be defined as when forces is created or generated in the muscles such that the length of a muscle shrinks, reduces or become compact in size. One of the contractions the muscles of a human body undergoes is the isometric contraction.

Isometric Contraction is a contraction whereby the force generated in the muscles does not cause it to shrink in size instead the muscles remains still. The joints as well as the limbs found in those areas don't move.

One of the importance of Isometric contraction in the human body is that is helps in maintaining the posture of the body.