Question 6 - Physical Education CBSE Class 12 Sample Paper for 2022 Boards [Term 2] - Solutions to CBSE Sample Paper - Physical Education Class 12

Transcript

What is the meaning of the Isotonic method and it is used for developing which ability. Answer Isotonic method Isotonic exercises were introduced by De Lorene in 1954. This term comes from the Greek word ‘so’ which means ‘same or equal’ maintaining equal (muscle) tone or tension’. In this one muscle group contracts the opposite relaxes during which the muscle changes its length. These are those exercises in which direct movements are visible to the 3rd person. In this case, personal muscular efforts are evidenced by visible movements. In isotonic exercises rapid movements are accomplished by reflex alteration of contraction and relaxation of antagonistic flexors and extensors of the joints concerned. Type of contraction where we notice the movements of objects is called isotonic contraction e.g. doing exercise with light weight or dumbbells etc. Most of the exercises fall under this category used to develop Strength. ISOTONIC METHOD Concentric Contraction Eccentric Contraction Most of the exercises fall under this category used to develop Strength