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This article says that it's carbohydrates more than protein that 's the fuel for building muscle.
Excerpt below....
There are many different theories out there about losing fat and gaining muscle mass. A common misperception is that increasing protein intake will foster greater muscle mass. Muscle is comprised of protein, but only about 22%. Working the muscle to muscular overload(strength/resistance training) boosts growth. However, proper fuels and energy are needed to support the training efforts to promote hypertrophy (growth in size) of the muscle.
Protein contributes minimally to energy needs (5 to 15%), and it is an inefficient energy source. However, if energy needs are not met by carbohydrate, then the body will use protein for energy demands. Carbohydrate is the primary fuel for working muscles. If carbohydrate levels are low, then workouts will be inhibited as a result of physical and mental fatigue as well as lessened enthousiasm and compromised performance. If the body does not have enough carbohydrate for fuel, it will use whatever energy source is avaliable. Protein can be biochemically broken down into carbohydrate, and the body will use dietary and muscle protein to provide for the lack of energy from carbohydrate. Excess protein also serves to dehydrate the body. When the body is dehydrated by as little as 5%, workouts are compromised. In the end, the muscle mass that people are trying to build, will ultimately not increase, and it may be broken down.
Entire article is at
http://www.wellness.gatech.edu/information/1_nutrition/17_gaining_muscle_mass_and_losing_fat.php
Thoughts ?
Excerpt below....
There are many different theories out there about losing fat and gaining muscle mass. A common misperception is that increasing protein intake will foster greater muscle mass. Muscle is comprised of protein, but only about 22%. Working the muscle to muscular overload(strength/resistance training) boosts growth. However, proper fuels and energy are needed to support the training efforts to promote hypertrophy (growth in size) of the muscle.
Protein contributes minimally to energy needs (5 to 15%), and it is an inefficient energy source. However, if energy needs are not met by carbohydrate, then the body will use protein for energy demands. Carbohydrate is the primary fuel for working muscles. If carbohydrate levels are low, then workouts will be inhibited as a result of physical and mental fatigue as well as lessened enthousiasm and compromised performance. If the body does not have enough carbohydrate for fuel, it will use whatever energy source is avaliable. Protein can be biochemically broken down into carbohydrate, and the body will use dietary and muscle protein to provide for the lack of energy from carbohydrate. Excess protein also serves to dehydrate the body. When the body is dehydrated by as little as 5%, workouts are compromised. In the end, the muscle mass that people are trying to build, will ultimately not increase, and it may be broken down.
Entire article is at
http://www.wellness.gatech.edu/information/1_nutrition/17_gaining_muscle_mass_and_losing_fat.php
Thoughts ?