There is no doubt that exercise is the only activity that we can truly say that no pain is definitely no gain. This sound like a cliché but this is really true when it comes in doing some activity, such as exercise. The feelings of pain such as muscle contractions are only the few signs that the exercise is really working. Muscular contractions or muscle twitch only occurs when a muscle in a specific area of the body lengthens or shortens and the contraction happens when there is a generation of force by muscle fibers. To further understand muscular contraction, there is a need to understand its four different types.
One of those exercise is Isotonic. This is a lifting exercise usually requires isotonic contractions and there are many types of weightlifting exercises. During an isotonic contraction muscles used during this exercise has muscular contraction in which tension is constant while the length changes. Lifting some weights are the basic examples of isotonic contraction which can be done with variety of equipments, such as a pair dumbbells because they are adjustable to different weights. With one flex of the bicep muscle, lifting objects above the head, doing some sit ups or simply swinging a bat contraction can be determined.
Eccentric muscle contraction is the exact opposite of isotonic muscle contraction since the muscles lengthens as it gains tension. Eccentric muscle contraction can be observed during the “lowering†stage of an exercise, just like the weight is pulling downward by the gravity. According to research, muscles contraction typically occurs when the resistance about a joint is greater than the muscular force that opposes the movement. Known as the one behind muscle breakdown and consequent muscle soreness, eccentric exercises only occurs due to resistance exercise.
Another type of exercise is isometric weight training. This type of exercise can only be recognized when there is no change in the muscle length, juts like a simple weight training exercises. Isometric muscle contraction is one of the many ways of loading the muscle and used in rehabilitation since this type of exercise is much easier to perform. It primary goal is to enhance the strength of the muscle group at the joint angle that sometimes by doing so it limits the strength of development all the way through the whole range of motion.
Lastly is the Isokenitic exercise - the only muscle contraction exercise with specialized equipment that provides uneven resistance to a movement. Such exercises are used to make the muscle contract or shorten as it gains tension. By doing this can also test and improve muscular strengths and endurance.