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.
Exercises with movement involve isotonic muscle contractions and exercises without movement involve isometric muscular contractions. Knowing the difference between these two different types of contractions can help you refine your workout routine, make the most of each exercise and get a comprehensive workout.