protein 轉醣嘅threshold?
能量消耗 priority carb > fat > protein
keto係 fat > protein ?
有threshold存在?
btw 我搵到段野應該答到佢
Protein Oxidation
Although not a significant source of energy for most activities, protein can be broken down into its constituent amino acids by various metabolic processes.
These amino acids can then be converted into glucose (in a process known as gluconeogenesis), pyruvate, or various Krebs cycle intermediates to produce ATP .
The contribution of amino acids to the production of ATP has been estimated to be minimal during short-term exercise but may
amount to 3% to 18% of the energy requirements during prolonged activity .
The major amino acids that are oxidized in skeletal muscle appear to be the branched-chain amino acids (leucine, isoleucine, and valine), although alanine, aspartate, and glutamate may also be used .
The nitrogencontaining waste products of amino acid breakdown
are eliminated through the formation of urea and small amounts of ammonia, which end up in the urine.
The elimination of ammonia is important because ammonia is toxic and is associated with fatigue.