EXERCISES AND METABOLIC RESPONSES

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Exercises and Metabolic Responses:

Exercise will stimulate a series of metabolic responses that affect the body’s anatomy, physiology, and biochemical makeup.

Here are some of the changes that are stimulated by endurance exercise:

-Decreased body fat
-Decreased resting heart rate
-Increased muscle glycogen storage capacity
-Increased muscle mitochondria density
-Increased resting ATP content in muscles
-Increased resting CP content in muscles
-Increased resting creatine in muscles
-Increased aerobic enzymes
-Increased slow twitch muscle fiber %
-Decreased fast twitch muscle fiber %
-Decreased muscle size, when compared to strength training
-Increased cardiac output
-Increased Krebs cycle enzymes
-Increased capillaries
The magnitude of these changes is driven primarily by whether the exercise is anaerobic or aerobic. The type and duration of exercise will physically stimulate muscles to develop more fast or slow twitch muscle fibers, and in turn dictate the primary energy mix used. High intensity exercise stimulates fast twitch muscle fiber development, while low intensity exercise results in slow twitch muscle fiber development. There are also a series of hormonal changes that occur on an overall basis during exercise and non-exercising periods. These changes also are benefited and facilitated with a nutrient profile that matches the type of metabolic flux.
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