Respuesta :
Carbohydrates prevent muscle breakdown. If we restrict carbohydrate intake, protein will be used as an energy source (RER) rather than for the development of lean muscle.
While it's fairly usual in sports to see athletes solely ingest protein after a workout, the key to recovery is actually a combination of protein and carbs. The respiratory quotient (RQ), which indicates the relative contributions of fat, carbohydrate, and protein to the oxidation fuel mixture, is the ratio of carbon dioxide production to oxygen consumption.
The ratio of oxygen absorption to metabolic carbon dioxide production is known as the respiratory exchange ratio (RER). A Respiratory Exchange Ratio (RER) value of 1.0 indicates that carbohydrate is the main fuel source, a value between 0.7 and 1.0 shows a mixture of fat and carbohydrate, and a value approaching 0.7 indicates that fat is the main fuel source. A varied diet typically correlates to an RER of about 0.8. When exercising hard, the RER may also be higher than 1.0. A value above 1.0 should be attributed to the aforementioned aspects of bicarbonate buffering rather than to substrate metabolism.
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