Furthermore, if the muscle length shortens, the contraction is concentric. But if the muscle length lengthens, then the contraction is eccentric. In natural movements that underlie locomotor activity, muscle contractions are multifaceted as they are able to produce changes in length and tension in a time-varying manner.uscle contractions can be described based on two variables: length and tension. A muscle contraction is described as isometric if the muscle tension changes but the muscle length remains the same. In contrast, a muscle contraction is isotonic if muscle length changes but the muscle tension remains the same.
Top definition. gut-wrenching. Adjective to describe something so painfully emotional, and tragic, that your stomach feels knotted. It relates to feelings of guilt, sadness and devastated sympathy. The really tragic suicide of ten year old Ashlynn Conner, from Illinois, suffering after being bullied, was described as 'gut-wrenching'. #devastated#heartbroken#shocked#horrified#disturbed#horrific#dreadful#gut wrenching#heart wrenching.
Tachypnea is the term that your doctor uses to describe your breathing if it is too fast, especially if you have fast, shallow breathing from a lung disease or other medical cause. The term hyperventilation is usually used if you are taking rapid, deep breaths.