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 Efficiency of Muscle Contraction: 1  Only about 20% of input energy converts into muscular work. 2  50% of energy from food is used in ATP formation. 3  If a muscle contraction is slow or without movement, energy is lost as maintenance heat.  If muscle contraction is rapid, energy is used to overcome friction.