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The General Adaptation Syndrome (Part I)
The theory of GAS was formulated in the middle of this century by Dr. Hans Selye is some time called his "stress theory" but more commonly the General Adaptation Syndrome. "GAS" provide a framework from which most exercise programs and training cycles can be designed. ventas de camisetas de futbol , Dr. Selye ‘s clinical observation with humans and experiments with mice and rates led him to propose a three ? stages process employed any living organism when adapting to a stimulus. The disrupting stimulus is called a stressor and may be beneficial (exercise) or harmful (germs). GAS proposes that when any stressor ? such as physical trauma, infection, heat, fight ? is imposed on a living organism, the organism's initial response results in decrease in its ability to cope with additional stressors. This is called the shock or initial alarm stage of GAS. If you are exposed to a flu virus, for example, your ability to cope with exercise is greatly reduced. As time passes after the exposure, however, your body should make internal adjustments that result in adaptations so that future exposure to original stressor in particular, and to other stressors in general, will be less disrupting to homeostasis. Camiseta Fiorentina ,
Reversal of the shock phase is termed counter shock, and it leads to the resistance phase of GAS. The effect of adaptation to a given stressor on your body's ability to cope with other stressor is called cross ? resistance. Camiseta FC Porto , This is the way for example; a person who stays in shape through regular exercise can better withstand the pressures of work or the common cold.
If multiple stressors are imposed on your body, counter shock may not occur, or the resistance phase may deteriorate your body, counter shock may not occur, or the resistance phase may deteriorate into the third or exhaustion phase of GAS. The possible negative effects of multiple stressors are referred to as cross sensitization. Failure to recover from the shock phase, or the exhaustion phase of GAS, may also occur from a single very potent stressor, or exposure to a given stressor for a prolonged period of time. Severe physical trauma from a car crash, for example may result in death. In a less extreme illustration heavy physical exercise day after for many weeks will probably result in over training, which is a manifestation of exhaustion phase of GAS.
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