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Module 1: Módulo 17: Introdução à mecânica e controle nervoso dos músculos esqueléticos

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Effects of Exercise or Lack of It

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Atrophy tab.
Whether by choice or as a result of injury or illness, a skeletal muscle may not be used. Without use, the striated muscle tissue tends to be lost.

The general process in which muscle or another type of tissue decreases is called atrophy. Where the muscle tissue has been, there is an invasion of FCT and fat.

A = without
TROPHY = growth

Hypertrophy Tab.
When a muscle is exercised to capacity, the muscle responds by increasing in mass. The increased mass results from an increase in the diameter of the individual muscle fibers. The number of muscle fibers does not increase. This general process is called hypertrophy.

Types of Exercises Tab.
Isometric. An activity in which a muscle produces tension without a change in length is called an isometric exercise.

ISO = same
METRIC = measurement

For example, if you clasp your hands together and pull without actually moving them, you are participating in an isometric exercise. It has been shown that isometric exercises build muscle strength rapidly. On the other hand, the skeletomuscular system may still lack range of motion.

Isotonic. In isotonic exercises, the active muscles change in length. As the prime mover decreases in length, the antagonistic muscle increases in length. However, both muscles are producing tension.