Isotonic contractions

Definition

Isotonic contractions occur when a muscle changes length, either shortening or lengthening, while the tension remains constant. This type of contraction is common during everyday activities such as walking or lifting objects.

Related terms

Isometric Contractions: Muscle contractions that increase tension without changing length, similar to pushing against a stationary wall.

Motor Unit:

A motor neuron and all of the skeletal muscle fibers it innervates, playing a crucial role in varying the strength of muscle contractions.

Muscle Tension: The force generated by the contraction of the muscle or its resistance to stretching during relaxation