Hyperactive definition, unusually or abnormally active: a company's hyperactive growth; the child's hyperactive imagination. See more.
muscle contraction. the process of force-generation in the fibres of any class of muscle, by the interaction of myosin head-groups in the thick filaments with actin molecules in one of the immediately neighbouring thin filaments.oncentric muscle contraction acceleration force generated within contracting agonist muscle tissue, by actin/myosin interaction; agonist muscle force overcomes antagonist muscle resistance, creating a net reduction in length of agonist muscle (see entry above).
Other Types of Muscle Contraction. A concentric muscle contraction is one of the three types of muscle contractions, which are also known as muscle fiber activations. The method by which muscles increase in strength and size is a complex physiologic process that requires both muscle activation and rest.