ISOMETRIC vs. ISOTONIC CONTRACTIONS

Isometric vs. Isotonic Contractions

Isometric vs. Isotonic Contractions

Introduction

Under a muscle contraction means the active shortening of a muscle. In a broader sense, tension of the muscle, which do not shorten, but the muscle against resistance in a given length are observed (isometric contraction) and those of a feature at the muscle force acting resistance, during which he will be lengthened (eccentric contraction ), the muscle contractions attributed (Gabriel, Basford and An 2002, p. 1203). A muscle is a part of the fabric of a human (animal), which moved as a whole rests mostly a bone or other muscles (displacement by layers of loose connective tissue , fascia and lodges) and through its connections with tendons in the position, limbs, internal body regions (abdominal pressure during coughing, micturition, defecation, parturition, etc.; breathing motion) to move and ultimately allows the individual forces on its environmental practice (such as a nail in the wall to beat) and self-move (locally changing movement).

Depending on the power (voltage) or change in length of the muscle, several different types of contraction:

Isotonic ("same tense"): the muscle shortens without force change.

Isometric ("same level"): the force increases with the same length of the muscle (holding-static). In the physical sense is no work done, since the distance traveled is equal to zero.

Auxotonic ("differently charged"): both force and length change. This is the most common type of contraction.

However, in this study, we will find out the differences between istonic and isometric contraction.

Discussion

There are many varieties of exercises. Know the differences between the different types of exercises and their effects help the athlete to achieve their goals. As for strength training, there are two basic types of exercises: isometric and isotonic. The combination of these two methods of strength training help to achieve optimal physical condition (Warman, Humphries and Purton 2002, p. 119).

Tension

When we exercise, the muscles develop tension. This tension occurs when the muscle shortens, lengthens, or remains static. A concentric contraction occurs when the muscle shortens, for example, lifting a weight. Concentric contraction occurs when a muscle develops sufficient voltage to overcome a resistance, so that the muscle shortens and moves a body part overcoming such resistance. An eccentric contraction occurs when the muscle is lengthened, for example, lowering a weight. An isometric contraction occurs when the muscle is tense, but does not change in length, such as bending.

Difference between Isometric and Isotronic Contractions

In the simplest sense, isotonic contraction, from the physiological point of view, those contractions in the muscle fibers to contract further, changes its length. Whereas, Isometric contraction this case the muscle remains shortened or lengthened static free, but even creates tension remains static, a daily life example would be when we bring a guy in his arms, the arms do not move the child remain in the same position and generate tension so that the child will not fall to the floor, there is no shortening or lengthening or muscle fibers (Rittweger, Beller and Felsenberg 2000, p. 134).

Secondly, Isometric exercises involve no joint movement, shortening or lengthening of a ...