In hyperactive children the arms must first be restrained by holding them tight in our hands. Montessori Elementary Materials Maria Montessori We must stimulate the apathetic and the sluggish; we must moderate the hyperactive; we must correct paresis, tics, etc.
Isotonic contractions are those which cause the muscle to change length as it contracts causing movement. There are two types of isotonic contraction: -. Concentric. A concentric contraction is a type of muscle contraction in which the muscles shorten while generating force.
The forearm gets pulled along with the weight in the case of concentric contraction. The biceps brach would shorten its movement during the course of concentric contraction. Inefficient muscle use results in the other type of isotonic contraction called as the eccentric contraction. In short, it can be said that both concentric and eccentric type of muscle contraction is tried and practiced by the weight lifter during his workouts at the gym during body building exercises. Hence, both these terms are associated with body building and weight lifting.