Sports Training — Physical Education STD 12 Commerce — Question

Strength can also be defined as the amount of force a muscle or muscle group can exert. Strength of the body can be measured in pounds or dynes. A certain level of strength is essential for a common man whereas, for a sportsman it is the most essential component.
Methods of Improving Strength:

1. Isometric Exercises: Isometric exercises are those exercises, which are not visible. In fact, there are no direct movements, hence they cannot be observed. In these exercises, work is performed but it is not seen directly. In these exercises, a group of muscles are stretched more than the other group of muscles. When these exercises are done, muscles do not change their length. They remain fixed or constant although muscles do not remain constant or still completely. Muscles
2. Isotonic Exercises: Isotonic exercises are those exercises in which movements can be seen directly. Work is done in these exercises. Isotonic exercises tone up the muscles. Muscles become flexible. Length of the muscles can be increased. by isotonic exercises. These exercises are of much value in the field of sports. These are the best for strength development. Calisthenics exercises, running and jumping on the spot, weight training exercises, exercises with medicine ball are the best examples of isotonic exercises. These exercises can be done with or without technical equipment.
3. Isokinetic Exercises: Isokinetic exercises are performed on specially designed machines. These exercises were developed by Pemine in 1968. These exercises involve a specific type of muscle contraction, which is usually not applicable in sports and games except in water-sports such as rowing and swimming. In isotonic exercises, contraction of muscle applies maximum force only at a particular angle during a range of movement, whereas, in isokinetic exercises contraction of muscle applies maximum force throughout the complete range of movement.