Isometric exercise

During isometric exercise is a special form of strength training by isometric contraction, where muscles are tense, but do not change their length. Isometric from iso ( = the same) and metric ( = the measure on ) literally means "equal measure " and means " equal length ", " Length of unchanged ". Unlike the dynamic ( auxotonic ) you train the muscle is not moved but kept a print or train, for example against a wall, a door casing or with a rope or towel up and for several seconds. ( See also:. Muscle contraction types ) operated regularly increases isometric muscle strength training with very little expenditure of time. An example of isometric training is arm wrestling.

Disadvantages

Isometric training leads to reduced blood supply during the holding work. However, the state of tension in the muscle remains the same. For the metabolism in the local area which means that metabolic degradation products (eg, lactate) accumulate to a greater extent and are poorly transported. Acidifies The muscle and hardened. So-called myogeloses, possibly with trigger points can occur and metabolism in this muscle area goes to zero.

Occupations with isometric stress

Each office paper presents an isometric burden: Hours of rigid upright sitting is physiologically " not provided " in humans. Although the back extensors ( erector spinae ) is supported by ligaments, but that's just a relief for the spine and not for the shoulder area. The primary working muscles, such as trapezius muscle, Mm. Rhomboids, levator scapulae, and the like, can quickly reach their limits. Only when the muscle is changed back to its length - active through exercise, stretching, passive through therapeutic work - they can be fully nourished again.