Isotonic is the word you're looking for.
Isotonic means the tension remains the same, but the length can change.
Isometric means the length remains the same, but the tension can change.
isometric contractions
The muscle length will not change during a contraction.
Isotonic contraction
An isometric contraction is the name given to a skeletal muscle that does not shorten, but increases tension. The muscles generate force to protect themselves.
Isotonic ContractionIsotonic Contraction
Isometric contraction. This type of contraction occurs when the muscle generates tension without changing its length, such as when holding a weight in a fixed position.
When a muscle contracts but does not change length, it is undergoing isometric contraction. During this type of contraction, the muscle generates tension without any visible movement or change in the muscle's length. This is commonly observed when holding a weight in a fixed position or pushing against an immovable object. Isometric contractions are important for stabilizing joints and maintaining posture.
proprioceptors
In an isotonic contraction, the muscle changes in length while maintaining a constant tension. This allows for movement to occur, such as bending the elbow or lifting a weight.
Muscle spindles primarily monitor muscle length and changes in muscle length, providing information about muscle stretch and contraction. Tendon organs, on the other hand, monitor muscle tension or the force of muscle contraction by detecting changes in tension within the tendons. Together, these sensory receptors help regulate muscle tone and protect muscles from injury.
Contraction in which opposing muscles contract against each other and prevent movement. Fixation action of a muscle in a static contraction is termed isometric, because it develops tension without changing length.
What is isometric exexrcises