Muscles work by either contracting or relaxing. The movement that they cause is dependent on the structure that they are attached to e.g contraction of the biceps causes the arm to bend upwards due to the attachment of ligaments.
Another word for skeletal muscle that is under conscious control is "voluntary muscle." These muscles are responsible for facilitating movement and are directly controlled by the nervous system, allowing for intentional actions like walking, lifting, and speaking.
synergistic muscle
A synergist muscle is a muscle that aids another by promoting the same movement.
Isotonic contractions are the type that involve muscle movement. This movement is due to a change in length as the muscle fibers shorten or lengthen.
muscle
the word voluntary muscles
synergist
contraction
muscle spasm
movement
dystrophia
hypertrophy